Basis of Presentation and Recent Developments	3 Months Ended
Mar. 31, 2024
Basis of Presentation and Recent Developments [Abstract]
Basis of Presentation and Recent Developments	Note 1 – Basis of Presentation and Recent Developments Middlesex Water Company (Middlesex or the Company) is the parent company and sole shareholder of Tidewater Utilities, Inc. (Tidewater), Pinelands Water Company (Pinelands Water) and Pinelands Wastewater Company (Pinelands Wastewater) (collectively, Pinelands), Utility Service Affiliates, Inc. (USA), and Utility Service Affiliates (Perth Amboy) Inc. (USA-PA). Southern Shores Water Company, LLC (Southern Shores) and White Marsh Environmental Systems, Inc. (White Marsh) are wholly-owned subsidiaries of Tidewater. The financial statements for Middlesex and its wholly-owned subsidiaries are reported on a consolidated basis. All significant intercompany accounts and transactions have been eliminated. The consolidated notes within the 2023 Annual Report on Form 10-K (the 2023 Form 10-K) are applicable to these financial statements and, in the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary (including normal recurring accruals) to present fairly the financial position as of March 31, 2024, the results of operations for the three month periods ended March 31, 2024 and 2023 and cash flows for the three month periods ended March 31, 2024 and 2023. Information included in the Condensed Consolidated Balance Sheet as of December 31, 2023, has been derived from the Company’s December 31, 2023 audited financial statements included in the 2023 Form 10-K. Recent Developments United States Environmental Protection Agency (USEPA) Issues Final Perfluoroalkyl Substances (PFAS) Regulations - In April 2024, the USEPA finalized drinking water regulations for PFAS, establishing maximum contaminant levels (MCLs) for three PFAS compounds (Regulated PFAS) that are lower than the current New Jersey Department of Environmental Protection MCLs adhered to by the Company. Under the new USEPA regulations effective April 2024, water systems must monitor for Regulated PFAS and have three years to complete initial monitoring (by April 2027), followed by ongoing compliance monitoring. Water systems must also provide the public with information on the levels of Regulated PFAS in their drinking water beginning in 2027. Water systems have five years (by April 2029) to implement solutions that reduce Regulated PFAS if monitoring shows that drinking water levels exceed these MCLs. Beginning in April 2029, water systems that have Regulated PFAS in drinking water which exceeds one or more of these MCLs must take action to reduce levels of these PFAS compounds in their drinking water and must provide notification to the public of the violation. In anticipation of these new USEPA standards, in 2023, the Company began implementing its strategy to meet these lower MCLs for Regulated PFAS and is currently performing preliminary engineering studies to ensure that effective PFAS treatment approaches are implemented. Recent Accounting Guidance There is no new adopted or proposed accounting guidance that the Company is aware of that could have a material impact on the Company’s financial statements.

Basis of Presentation and Recent Developments

3 Months Ended

Mar. 31, 2024

Basis of Presentation and Recent Developments [Abstract]

Basis of Presentation and Recent Developments

Note 1 – Basis of Presentation and Recent Developments

Middlesex Water Company (Middlesex or the Company) is the parent company and sole shareholder of Tidewater Utilities, Inc. (Tidewater), Pinelands Water Company (Pinelands Water) and Pinelands Wastewater Company (Pinelands Wastewater) (collectively, Pinelands), Utility Service Affiliates, Inc. (USA), and Utility Service Affiliates (Perth Amboy) Inc. (USA-PA). Southern Shores Water Company, LLC (Southern Shores) and White Marsh Environmental Systems, Inc. (White Marsh) are wholly-owned subsidiaries of Tidewater. The financial statements for Middlesex and its wholly-owned subsidiaries are reported on a consolidated basis. All significant intercompany accounts and transactions have been eliminated.

The consolidated notes within the 2023 Annual Report on Form 10-K (the 2023 Form 10-K) are applicable to these financial statements and, in the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary (including normal recurring accruals) to present fairly the financial position as of March 31, 2024, the results of operations for the three month periods ended March 31, 2024 and 2023 and cash flows for the three month periods ended March 31, 2024 and 2023. Information included in the Condensed Consolidated Balance Sheet as of December 31, 2023, has been derived from the Company’s December 31, 2023 audited financial statements included in the 2023 Form 10-K.

Recent Developments

United States Environmental Protection Agency (USEPA) Issues Final Perfluoroalkyl Substances (PFAS) Regulations - In April 2024, the USEPA finalized drinking water regulations for PFAS, establishing maximum contaminant levels (MCLs) for three PFAS compounds (Regulated PFAS) that are lower than the current New Jersey Department of Environmental Protection MCLs adhered to by the Company. Under the new USEPA regulations effective April 2024, water systems must monitor for Regulated PFAS and have three years to complete initial monitoring (by April 2027), followed by ongoing compliance monitoring. Water systems must also provide the public with information on the levels of Regulated PFAS in their drinking water beginning in 2027. Water systems have five years (by April 2029) to implement solutions that reduce Regulated PFAS if monitoring shows that drinking water levels exceed these MCLs.

Beginning in April 2029, water systems that have Regulated PFAS in drinking water which exceeds one or more of these MCLs must take action to reduce levels of these PFAS compounds in their drinking water and must provide notification to the public of the violation.

In anticipation of these new USEPA standards, in 2023, the Company began implementing its strategy to meet these lower MCLs for Regulated PFAS and is currently performing preliminary engineering studies to ensure that effective PFAS treatment approaches are implemented.

Recent Accounting Guidance

There is no new adopted or proposed accounting guidance that the Company is aware of that could have a material impact on the Company’s financial statements.