$MSEX
MIDDLESEX WATER CO Stock $msex

$msex Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000117494724001201 Filed on October 31, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$55.07M
YoY Change		17.95%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$6.309M
YoY Change		-1.05%
% of Gross Profit
Operating Expenses		$37.60M
YoY Change		10.93%
Operating Profit		$17.50M
YoY Change		36.49%
Interest Expense		$3.411M
YoY Change		-3.04%
% of Operating Profit		19.49%
Other Income/Expense, Net		$1.968M
YoY Change		37.43%
Pretax Income		$16.06M
YoY Change		49.57%
Income Tax		$1.739M
% Of Pretax Income		10.83%
Net Earnings		$14.32M
YoY Change		43.33%
Net Earnings / Revenue		26.0%
Basic Earnings Per Share		$0.80
Diluted Earnings Per Share		$0.80
COMMON SHARES
Basic Shares Outstanding	17.86M shares	17.83M shares
Diluted Shares Outstanding		17.95M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments		$6.344M
YoY Change		111.47%
Cash & Equivalents		$6.344M
Short-Term Investments
Other Short-Term Assets		$16.55M
YoY Change		16.54%
Inventory		$6.550M
Prepaid Expenses		$3.131M
Receivables		$22.70M
Other Receivables		$0.00
Total Short-Term Assets		$52.15M
YoY Change		-61.59%
LONG-TERM ASSETS
Property, Plant & Equipment		$1.052B
YoY Change		5.21%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$125.2M
YoY Change		245333.33%
Total Long-Term Assets		$1.177B
YoY Change		6.3%
TOTAL ASSETS
Total Short-Term Assets		$52.15M
Total Long-Term Assets		$1.177B
Total Assets		$1.230B
YoY Change		-1.11%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable		$32.36M
YoY Change		13.11%
Accrued Expenses		$2.396M
YoY Change		-22.71%
Deferred Revenue		$1.555M
YoY Change
Short-Term Debt		$17.50M
YoY Change		-58.63%
Long-Term Debt Due		$358.9M
YoY Change		4721.18%
Total Short-Term Liabilities		$79.91M
YoY Change		-34.12%
LONG-TERM LIABILITIES
Long-Term Debt		$352.3M
YoY Change		-0.56%
Other Long-Term Liabilities		$437.0K
YoY Change		-35.83%
Total Long-Term Liabilities		$352.7M
YoY Change		-0.63%
TOTAL LIABILITIES
Total Short-Term Liabilities		$79.91M
Total Long-Term Liabilities		$352.7M
Total Liabilities		$432.6M
YoY Change		-9.16%
SHAREHOLDERS EQUITY
Retained Earnings		$194.4M
YoY Change		10.22%
Common Stock		$247.6M
YoY Change		1.78%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$441.9M
YoY Change
Total Liabilities & Shareholders Equity		$1.230B
YoY Change		-1.11%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$14.32M
YoY Change		43.33%
Depreciation, Depletion And Amortization		$6.309M
YoY Change		-1.05%
Cash From Operating Activities		$19.46M
YoY Change		81.83%
INVESTING ACTIVITIES
Capital Expenditures		$20.74M
YoY Change		-7.52%
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities		-$20.74M
YoY Change		-7.52%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-394.0K
YoY Change		-103.81%
NET CHANGE
Cash From Operating Activities		19.46M
Cash From Investing Activities		-20.74M
Cash From Financing Activities		-394.0K
Net Change In Cash		-1.681M
YoY Change		20.07%
FREE CASH FLOW
Cash From Operating Activities		$19.46M
Capital Expenditures		$20.74M
Free Cash Flow		-$1.287M
YoY Change		-89.03%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2024Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	600000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	0-422
	dei	Entity Registrant Name EntityRegistrantName	MIDDLESEX WATER COMPANY
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1114430
	dei	Entity Address Address Line1 EntityAddressAddressLine1	485C Route One South
	dei	Entity Address City Or Town EntityAddressCityOrTown	Iselin
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	08830
	dei	City Area Code CityAreaCode	(732)
	dei	Local Phone Number LocalPhoneNumber	634-1500
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	MSEX
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17855200	shares
CY2024Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	55100000	usd
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	144770000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
CY2024Q3	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	25359000	usd
CY2023Q3	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	22581000	usd
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	67649000	usd
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	64042000	usd
CY2024Q3	us-gaap	Depreciation Depreciation	6309000	usd
CY2023Q3	us-gaap	Depreciation Depreciation	6376000	usd
	us-gaap	Depreciation Depreciation	18010000	usd
	us-gaap	Depreciation Depreciation	18546000	usd
CY2024Q3	us-gaap	Taxes Other TaxesOther	5931000	usd
CY2023Q3	us-gaap	Taxes Other TaxesOther	4936000	usd
	us-gaap	Taxes Other TaxesOther	16430000	usd
	us-gaap	Taxes Other TaxesOther	14104000	usd
CY2024Q3	us-gaap	Operating Expenses OperatingExpenses	37599000	usd
CY2023Q3	us-gaap	Operating Expenses OperatingExpenses	33893000	usd
	us-gaap	Operating Expenses OperatingExpenses	102089000	usd
	us-gaap	Operating Expenses OperatingExpenses	96692000	usd
CY2024Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	17501000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12822000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	42681000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	30980000	usd
CY2024Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	354000	usd
CY2023Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	496000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	787000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	2162000	usd
CY2024Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1614000	usd
CY2023Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	936000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	9202000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3124000	usd
CY2024Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1968000	usd
CY2023Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1432000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	9989000	usd
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5286000	usd
CY2024Q3	us-gaap	Interest Expense InterestExpense	3411000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	3518000	usd
	us-gaap	Interest Expense InterestExpense	10721000	usd
	us-gaap	Interest Expense InterestExpense	9364000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16058000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10736000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	41949000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	26902000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1739000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	746000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6402000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1143000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	14319000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35547000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
CY2024Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	29000	usd
CY2023Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	89000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	90000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	14290000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9960000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	35458000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25669000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.8
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.99
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.8
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.98
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.44
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17838000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17758000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17828000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17708000	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17952000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17873000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17943000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17823000	shares
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	310661000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	303791000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	837233000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission And Distribution PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution	809862000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	104103000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	100593000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	34995000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	19636000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1286992000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	1233882000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	249266000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	235540000	usd
CY2024Q3	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	1037726000	usd
CY2023Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	998342000	usd
CY2024Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6344000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2390000	usd
CY2024Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2424000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2137000	usd
CY2024Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	22703000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	18172000	usd
CY2023Q4	msex	Litigation Settlements Receivable LitigationSettlementsReceivable	69872000	usd
CY2024Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	13418000	usd
CY2023Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	9297000	usd
CY2024Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6550000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	6972000	usd
CY2024Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3131000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1833000	usd
CY2024Q3	us-gaap	Assets Current AssetsCurrent	52146000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	108536000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2718000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3185000	usd
CY2024Q3	msex	Preliminary Survey And Investigation Charges Non Current PreliminarySurveyAndInvestigationChargesNonCurrent	2018000	usd
CY2023Q4	msex	Preliminary Survey And Investigation Charges Non Current PreliminarySurveyAndInvestigationChargesNonCurrent	1932000	usd
CY2024Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	96302000	usd
CY2023Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	90694000	usd
CY2024Q3	msex	Nonutility Assets Net Non Current NonutilityAssetsNetNonCurrent	11854000	usd
CY2023Q4	msex	Nonutility Assets Net Non Current NonutilityAssetsNetNonCurrent	11584000	usd
CY2024Q3	msex	Employee Benefit Plans EmployeeBenefitPlans	26851000	usd
CY2023Q4	msex	Employee Benefit Plans EmployeeBenefitPlans	21779000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	139743000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	129174000	usd
CY2024Q3	us-gaap	Assets Assets	1229615000	usd
CY2023Q4	us-gaap	Assets Assets	1236052000	usd
CY2024Q3	us-gaap	Common Stock Value CommonStockValue	247576000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	246764000	usd
CY2024Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	194359000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176227000	usd
CY2024Q3	us-gaap	Partners Capital PartnersCapital	441935000	usd
CY2023Q4	us-gaap	Partners Capital PartnersCapital	422991000	usd
CY2024Q3	us-gaap	Preferred Stock Value PreferredStockValue	1889000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	2084000	usd
CY2024Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	352282000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	358153000	usd
CY2024Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	796106000	usd
CY2023Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	783228000	usd
CY2024Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	7745000	usd
CY2023Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	7740000	usd
CY2024Q3	us-gaap	Notes Payable Current NotesPayableCurrent	17500000	usd
CY2023Q4	us-gaap	Notes Payable Current NotesPayableCurrent	42750000	usd
CY2024Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	32355000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	27618000	usd
CY2023Q4	msex	Litigation Settlement Payable LitigationSettlementPayable	6237000	usd
CY2024Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	13408000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	10535000	usd
CY2024Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	2396000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	3138000	usd
CY2024Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	1555000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	1390000	usd
CY2024Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4953000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4421000	usd
CY2024Q3	us-gaap	Liabilities Current LiabilitiesCurrent	79912000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	103829000	usd
CY2024Q3	msex	Construction Advances ConstructionAdvances	21542000	usd
CY2023Q4	msex	Construction Advances ConstructionAdvances	21313000	usd
CY2024Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2589000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3063000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	95413000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	88736000	usd
CY2024Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	53920000	usd
CY2023Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	113021000	usd
CY2024Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	437000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	592000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	173901000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	226725000	usd
CY2024Q3	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	179696000	usd
CY2023Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	122270000	usd
CY2024Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1229615000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1236052000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35547000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	20231000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	22106000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	408000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4685000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	465000	usd
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1300000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	318000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	144000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1227000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1790000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4531000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2972000	usd
	msex	Increase Decreasein Unbilled Revenues IncreaseDecreaseinUnbilledRevenues	4121000	usd
	msex	Increase Decreasein Unbilled Revenues IncreaseDecreaseinUnbilledRevenues	2657000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	-422000	usd
	us-gaap	Increase Decrease In Raw Materials Packaging Materials And Supplies Inventories IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories	228000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1298000	usd
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	294000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4737000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3757000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	2873000	usd
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-4019000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-742000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	11000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-5781000	usd
	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1487000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	165000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	94000	usd
	msex	Increase Decreasein Recovered Costs Environmental Litigation Settlement IncreaseDecreaseinRecoveredCostsEnvironmentalLitigationSettlement	8774000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2245000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4255000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	37335000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39986000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	322000	usd
	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	862000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	49480000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	73074000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-49480000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-73074000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	6438000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16460000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	592000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	70640000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-25250000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-13250000	usd
	msex	Proceeds From Environmental Litigation Settlement ProceedsFromEnvironmentalLitigationSettlement	63635000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	54000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	123000	usd
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	-10000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1350000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	619000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	740000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9025000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17326000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16600000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	89000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	90000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1639000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-283000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16099000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	32230000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	3954000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-858000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2390000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3828000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6344000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2970000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	6959000	usd
	us-gaap	Contribution Of Property ContributionOfProperty	5954000	usd
	msex	Litigation Settlement Receivable LitigationSettlementReceivable	-6237000	usd
	msex	Litigation Settlement Receivable LitigationSettlementReceivable	93163000	usd
	msex	Litigation Settlements Payable LitigationSettlementsPayable	-6237000	usd
	msex	Litigation Settlements Payable LitigationSettlementsPayable	27949000	usd
	us-gaap	Preferred Stock Conversions Inducements PreferredStockConversionsInducements	194000	usd
	us-gaap	Interest Paid Net InterestPaidNet	11695000	usd
	us-gaap	Interest Paid Net InterestPaidNet	9589000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	322000	usd
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	862000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2413000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2716000	usd
CY2024Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000	shares
CY2024Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17855000	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17821000	shares
CY2024Q3	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	247576000	usd
CY2023Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	246764000	usd
CY2024Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	194359000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	176227000	usd
CY2024Q3	us-gaap	Partners Capital PartnersCapital	441935000	usd
CY2023Q4	us-gaap	Partners Capital PartnersCapital	422991000	usd
CY2024Q3	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2023Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	120000	usd
CY2024Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	19000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	21000	shares
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1889000	usd
CY2023	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2084000	usd
CY2024Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	358889000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	364736000	usd
CY2024Q3	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	6386000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	6529000	usd
CY2024Q3	us-gaap	Debt Instrument Unamortized Discount Current DebtInstrumentUnamortizedDiscountCurrent	5248000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Discount Current DebtInstrumentUnamortizedDiscountCurrent	5372000	usd
CY2024Q3	us-gaap	Deferred Finance Costs Current Gross DeferredFinanceCostsCurrentGross	7745000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Current Gross DeferredFinanceCostsCurrentGross	7740000	usd
CY2024Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	352282000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	358153000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	400328000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	5868000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	2342000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	360000	usd
CY2023Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5513000	usd
CY2023Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	403355000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9901000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3402000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	27000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	360000	usd
CY2023Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5538000	usd
CY2023Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	411477000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3281000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	424000	usd
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5549000	usd
CY2023Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2023Q3	us-gaap	Dividends Common Stock DividendsCommonStock	10000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	419583000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	422991000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	10682000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	252000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-465000	usd
CY2024Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5738000	usd
CY2024Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2024Q1	us-gaap	Stockholders Equity StockholdersEquity	427692000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	10546000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	253000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-187000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	397000	usd
CY2024Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5793000	usd
CY2024Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	30000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	432878000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	14319000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	182000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	186000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	-194000	usd
CY2024Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5795000	usd
CY2024Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	29000	usd
CY2024Q3	us-gaap	Stockholders Equity StockholdersEquity	441935000	usd
	us-gaap	Public Utilities Approved Rate Increase Decrease Amount PublicUtilitiesApprovedRateIncreaseDecreaseAmount	563100000	usd
	us-gaap	Public Utilities Approved Return On Equity Percentage PublicUtilitiesApprovedReturnOnEquityPercentage	0.096	pure
	us-gaap	Carrying Costs Property And Exploration Rights CarryingCostsPropertyAndExplorationRights	4100000	usd
CY2024Q3	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	1800000	usd
CY2024Q2	msex	Surcharge For Costs Incurred SurchargeForCostsIncurred	1400000	usd
CY2024Q3	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	10300000	usd
CY2024Q3	msex	Percentage Of Current Revenue PercentageOfCurrentRevenue	0.2566	pure
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	13498000	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	700000	usd
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	118501000	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9000000	usd
	us-gaap	Sale Of Stock Consideration Received On Transaction SaleOfStockConsiderationReceivedOnTransaction	1000000	usd
CY2024Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	7
CY2024Q3	us-gaap	Preferred Stock Convertible Shares Issuable PreferredStockConvertibleSharesIssuable	22188000	shares
CY2024Q3	us-gaap	Loans Receivable Basis Spread On Variable Rate LoansReceivableBasisSpreadOnVariableRate	0	pure
CY2024Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	129602000	usd
CY2024Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	127760000	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	133374000	usd
CY2023Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	131745000	usd
CY2024Q3	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	229300000	usd
CY2023Q4	us-gaap	Fair Value Option Ineligible Items Aggregate Carrying Amount FairValueOptionIneligibleItemsAggregateCarryingAmount	231300000	usd
CY2024Q3	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21500000	usd
CY2023Q4	msex	Customer Advances For Construction Work CustomerAdvancesForConstructionWork	21300000	usd
CY2024Q3	us-gaap	Preferred Stock Convertible Conversion Price PreferredStockConvertibleConversionPrice	7
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	14319000	usd
CY2024Q3	msex	Net Income Attributable To Number Of Basic Shares NetIncomeAttributableToNumberOfBasicShares	17838000	shares
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
CY2023Q3	msex	Net Income Attributable To Number Of Basic Shares NetIncomeAttributableToNumberOfBasicShares	17758000	shares
CY2024Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	29000	usd
CY2023Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	30000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	14290000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17838000	shares
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9960000	usd
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17758000	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.8
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14290000	usd
CY2024Q3	msex	Earnings Applicable To Common Stock Dilutive Shares Before Adjustment EarningsApplicableToCommonStockDilutiveSharesBeforeAdjustment	17838000	shares
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	9960000	usd
CY2023Q3	msex	Earnings Applicable To Common Stock Dilutive Shares Before Adjustment EarningsApplicableToCommonStockDilutiveSharesBeforeAdjustment	17758000	shares
CY2024Q3	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
CY2024Q3	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
CY2023Q3	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
CY2023Q3	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
CY2024Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000	usd
CY2024Q3	us-gaap	Preferred Stock Dividends Shares PreferredStockDividendsShares	114000	shares
CY2023Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000	usd
CY2023Q3	us-gaap	Preferred Stock Dividends Shares PreferredStockDividendsShares	115000	shares
CY2024Q3	msex	Adjusted Earnings Applicable To Common Stock Diluted AdjustedEarningsApplicableToCommonStockDiluted	14307000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17952000	shares
CY2023Q3	msex	Adjusted Earnings Applicable To Common Stock Diluted AdjustedEarningsApplicableToCommonStockDiluted	9977000	usd
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17873000	shares
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.8
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
	us-gaap	Net Income Loss NetIncomeLoss	35547000	usd
	msex	Net Income Attributable To Number Of Basic Shares NetIncomeAttributableToNumberOfBasicShares	17828000	shares
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
	msex	Net Income Attributable To Number Of Basic Shares NetIncomeAttributableToNumberOfBasicShares	17708000	shares
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	89000	usd
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	90000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	35458000	usd
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17828000	shares
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25669000	usd
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17708000	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.99
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	35458000	usd
	msex	Earnings Applicable To Common Stock Dilutive Shares Before Adjustment EarningsApplicableToCommonStockDilutiveSharesBeforeAdjustment	17828000	shares
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	25669000	usd
	msex	Earnings Applicable To Common Stock Dilutive Shares Before Adjustment EarningsApplicableToCommonStockDilutiveSharesBeforeAdjustment	17708000	shares
	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	7
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	50000	usd
	us-gaap	Preferred Stock Dividends Shares PreferredStockDividendsShares	115000	shares
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	51000	usd
	us-gaap	Preferred Stock Dividends Shares PreferredStockDividendsShares	115000	shares
	msex	Adjusted Earnings Applicable To Common Stock Diluted AdjustedEarningsApplicableToCommonStockDiluted	35508000	usd
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17943000	shares
	msex	Adjusted Earnings Applicable To Common Stock Diluted AdjustedEarningsApplicableToCommonStockDiluted	25720000	usd
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17823000	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.98
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.44
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segments
CY2024Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	55100000	usd
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	144770000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
CY2024Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	17501000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12822000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	42681000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	30980000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	14319000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	9990000	usd
	us-gaap	Net Income Loss NetIncomeLoss	35547000	usd
	us-gaap	Net Income Loss NetIncomeLoss	25759000	usd
CY2024Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	20743000	usd
CY2023Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	22439000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	49480000	usd
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	73074000	usd
CY2024Q3	us-gaap	Assets Assets	1229615000	usd
CY2023Q4	us-gaap	Assets Assets	1236052000	usd
CY2024Q3	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	140000000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	17500000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	122500000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	140000000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	23476000	usd
CY2023Q3	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	25015000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	44620000	usd
	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	32860000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0641	pure
CY2023Q3	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0637	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0642	pure
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0589	pure
	msex	Average Purchase Of Gallons AveragePurchaseOfGallons	47	l
CY2024Q3	msex	Cost Of Treated Water CostOfTreatedWater	796000	usd
CY2023Q3	msex	Cost Of Treated Water CostOfTreatedWater	1607000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	2697000	usd
	msex	Cost Of Treated Water CostOfTreatedWater	4353000	usd
CY2024Q3	msex	Cost Of Untreated Water CostOfUntreatedWater	611000	usd
CY2023Q3	msex	Cost Of Untreated Water CostOfUntreatedWater	812000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	2322000	usd
	msex	Cost Of Untreated Water CostOfUntreatedWater	2352000	usd
CY2024Q3	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	1407000	usd
CY2023Q3	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	2419000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	5019000	usd
	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	6705000	usd
CY2024Q3	msex	Estimated Incremental Borrowing Rate EstimatedIncrementalBorrowingRate	0.0403	pure
CY2024Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
CY2023Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	200000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	600000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	600000	usd
CY2024Q3	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2023Q4	msex	Right Of Use Asset At Lease Inception RightOfUseAssetAtLeaseInception	7300000	usd
CY2024Q3	msex	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	4600000	usd
CY2023Q4	msex	Operating Lease Right Of Use Asset Accumulated Amortization OperatingLeaseRightOfUseAssetAccumulatedAmortization	4100000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2700000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3200000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	200000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	800000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	900000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	900000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	900000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	900000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	4600000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1400000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	3200000	usd
CY2024Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	2600000	usd
	msex	Estimatedobligationexpenditure Estimatedobligationexpenditure	14500000	usd
	us-gaap	Loss Contingency Settlement Agreement Date1 LossContingencySettlementAgreementDate1	2024-08-30
	us-gaap	Pension Contributions PensionContributions	2000000	usd
	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	900000	usd
CY2024Q3	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	3208000	usd
CY2023Q3	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	3137000	usd
	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	9588000	usd
	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	9309000	usd
CY2024Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	55069000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	46690000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	144677000	usd
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	127561000	usd
CY2024Q3	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	391000	usd
CY2023Q3	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	210000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	595000	usd
	us-gaap	Regulated Operating Revenue Other RegulatedOperatingRevenueOther	373000	usd
CY2024Q3	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	117000	usd
CY2023Q3	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	114000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	350000	usd
	msex	Other Nonregulated Revenues OtherNonregulatedRevenues	340000	usd
CY2024Q3	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-477000	usd
CY2023Q3	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-299000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-852000	usd
	msex	Inter Segment Elimination Operating Revenues InterSegmentEliminationOperatingRevenues	-602000	usd
CY2024Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	55100000	usd
CY2023Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	46715000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	144770000	usd
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	127672000	usd
CY2024Q3	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2024Q3	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q3	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2024Q3	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2024Q3	msex	Litigation Settlements Receivable LitigationSettlementsReceivable		usd
CY2024Q3	msex	Litigation Settlement Payable LitigationSettlementPayable		usd
	msex	Increase Decreasein Recovered Costs Environmental Litigation Settlement IncreaseDecreaseinRecoveredCostsEnvironmentalLitigationSettlement		usd
	msex	Proceeds From Environmental Litigation Settlement ProceedsFromEnvironmentalLitigationSettlement		usd
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans		usd
	us-gaap	Preferred Stock Conversions Inducements PreferredStockConversionsInducements		usd
CY2024Q3	msex	Common Stock Value Authorized CommonStockValueAuthorized		usd
CY2023Q4	msex	Common Stock Value Authorized CommonStockValueAuthorized		usd
CY2024Q3	msex	Preferred Stock Value Authorized PreferredStockValueAuthorized		usd
CY2023Q4	msex	Preferred Stock Value Authorized PreferredStockValueAuthorized		usd
CY2024Q3	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding		usd
CY2023Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding		usd
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Central Index Key EntityCentralIndexKey	0000066004

Files In Submission

Name	View Source	Status
0001174947-24-001201-index-headers.html	Edgar Link	pending
0001174947-24-001201-index.html	Edgar Link	pending
0001174947-24-001201.txt	Edgar Link	pending
0001174947-24-001201-xbrl.zip	Edgar Link	pending
ex10-59.htm	Edgar Link	pending
ex31-1.htm	Edgar Link	pending
ex31-2.htm	Edgar Link	pending
ex32-1.htm	Edgar Link	pending
ex32-2.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
msex-20240930.htm	Edgar Link	pending
msex-20240930.xsd	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
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R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
msex-20240930_cal.xml	Edgar Link	unprocessable
msex-20240930_def.xml	Edgar Link	unprocessable
msex-20240930_lab.xml	Edgar Link	unprocessable
msex-20240930_pre.xml	Edgar Link	unprocessable
msex-20240930_htm.xml	Edgar Link	completed
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
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R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
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R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
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R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable

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$MSEX
MIDDLESEX WATER CO Stock $msex

2024 Q4 Form 10-Q Financial Statement

#000117494724001201 Filed on October 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX MIDDLESEX WATER CO Stock $msex

2024 Q4 Form 10-Q Financial Statement

#000117494724001201 Filed on October 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MSEX
MIDDLESEX WATER CO Stock $msex