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Basis of Presentation and Recent Developments | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Basis of Presentation and Recent Developments | 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 2024 Annual Report on Form 10-K (the 2024 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 fairly state the Company’s financial position as of September 30, 2025, the results of operations for the three and nine month periods ended September 30, 2025 and 2024 and cash flows for the nine month periods ended September 30, 2025 and 2024. Information included in the Condensed Consolidated Balance Sheet as of December 31, 2024, has been derived from the Company’s December 31, 2024 audited financial statements included in the 2024 Form 10-K. Recent Developments Perfluoroalkyl Substances (PFAS) Multi-District Litigation Settlement - Several of the Company’s utility subsidiaries are parties to a multi-district litigation (MDL) lawsuit against manufacturers of certain PFAS for damages, contribution and reimbursement of costs incurred and continuing to be incurred to address the presence of such PFAS in public water supply systems owned and operated by these utility subsidiaries and throughout their service areas. Settlements with several defendants in the MDL have received final approval by the MDL court. The Company timely submitted to the MDL court its Phase One claim forms under settlement agreements with defendants 3M Company, DuPont de Nemours, Inc., Tyco Fire Products LP and BASF Corporation. In the third quarter of 2025, the Company received an initial settlement payment from defendant 3M Company of $0.4 million, net of legal fees and administrative costs. This was recorded as a regulatory liability as the Company intends to seek regulatory approval from its respective public utility commissions to apply the net proceeds for the benefit of customers. In October 2025, the Company received $0.7 million in additional settlement payments. The Company anticipates receiving additional settlement payments during the remainder of 2025 from the defendants named above. Tidewater Acquisition of the Water Utility Assets of the Town of Ocean View, Delaware - In April 2025, Tidewater completed the acquisition of the water utility assets of the Town of Ocean View, Delaware (Ocean View) for approximately $4.6 million. Ocean View serves approximately 900 customers in Sussex County, Delaware, who have been receiving water supply from Tidewater since the system was constructed in 2008. The pro forma effect of this acquisition is not material to the Company’s consolidated results of operations. United States Environmental Protection Agency (USEPA) Issues Final 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. The USEPA has announced its plans to issue a proposed rule in Fall 2025 extending the compliance date to 2031. Beginning in April 2029 and absent an extension by the USEPA, 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 finalizing preliminary engineering studies and has began preliminary design of for PFAS treatment at the Company's largest water treatment facility in New Jersey to ensure that effective PFAS treatment approaches are implemented. Recent Accounting Guidance The recently issued accounting standards that have not yet been adopted by the Company as of September 30, 2025 are as follows:
Standard |  | Description |  | Date of Adoption |  | Application |  | Effect on the Condensed Consolidated Financial Statements
Accounting Standards Update (“ASU”) ASU 2024-03 “Disaggregation of Income Statement Expenses” |  | The ASU enhances disclosures related to income statement expenses to further disaggregate expenses in the footnotes to the financial statements. The standard requires disaggregation of any relevant expense caption presented on the face of the income statement that contains the following expense categories: purchases of inventory, employee compensation, depreciation, intangible asset amortization, and depletion. Further, the standard requires disclosure of the total amount and the entity’s definition of selling expenses. |  | The ASU is effective for the Company beginning with its annual financial statements for the year ending December 31, 2027. Early adoption is permitted. |  | Prospective, with retrospective application also permitted. |  | The Company is currently evaluating the requirements of ASU 2024-03.
ASU 2023-09 “Improvements to Income Tax Disclosures” |  | The ASU amends certain income tax disclosure requirements, including adding requirements to present the reconciliation of income tax expense computed at the statutory rate to actual income tax expense using both percentages and amounts and providing a disaggregation of income taxes paid. Further, certain disclosures are eliminated, including the current requirement to disclose information on changes in unrecognized tax benefits in the next 12 months. |  | The ASU is effective for the Company beginning with its annual financial statements for the year ending December 31, 2025. Early adoption is permitted. |  | Prospective, with retrospective application also permitted. |  | The Company is currently evaluating the requirements of ASU 2023-09, but does not expect adoption of this ASU to have a material impact on its financial statements.
ASU 2025-06 "Internal-Use Software" |  | This ASU removes all reference to prescriptive and sequential software development stages, requiring an entity to start capitalizing software costs when the following criteria are both met: (i) management has authorized and committed to funding the software project and (ii) it is probable that the project will be completed and the software will be used to perform the function intended. Further, the standard requires disclosure for all capitalized internal-use software costs and removes the requirement for intangibles disclosures for capitalized internal-use software. |  | The ASU is effective for the Company beginning with its annual financial statements for the year ending December 31, 2025. Early adoption is permitted. |  | Prospective, with a modified transition or retrospective application also permitted. |  | The Company is evaluating the impact of ASU 2025-06 on its Consolidated Financial Statements and the timing of adoption.

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- Definition The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-1 + Details
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