Rate and Regulatory Matters	3 Months Ended
Mar. 31, 2023
Regulated Operations [Abstract]
Rate and Regulatory Matters	Note 2 – Rate and Regulatory Matters Middlesex – In December 2021, Middlesex’s base rate case was concluded, by negotiated settlement, resulting in an expected increase in annual operating revenues of $27.7 million. The increase was implemented in two phases with $20.7 million of the increase effective January 1, 2022 and the remaining $7.0 million effective January 1, 2023. As part of the settlement, the Purchased Water Adjustment Clause (PWAC), which is a rate mechanism that allows for recovery of increased purchased water costs between base rate case filings, was reset to zero. In September 2022, the NJBPU approved Middlesex's Emergency Relief Motion to reset its PWAC tariff rate to recover additional costs of $2.7 million for the purchase of treated water from a non-affiliated water utility. The increase, effective October 1, 2022, is on an interim basis and subject to refund with interest, pending final resolution of this matter, which is expected in the second quarter of 2023. Pinelands – On April 12, 2023, Pinelands Water and Pinelands Wastewater concluded their base rate case matters when the NJBPU approved a combined $1.0 million increase in base rates, effective April 15, 2023. The requests were necessitated by capital infrastructure investments the companies have made as well as increased operations and maintenance costs. Twin Lakes Utilities, Inc. (Twin Lakes) – Twin Lakes provides water services to approximately 115 residential customers in Shohola, Pennsylvania. Pursuant to the Pennsylvania Public Utility Code, Twin Lakes filed a petition requesting the Pennsylvania Public Utilities Commission (PAPUC) to order the acquisition of Twin Lakes by a capable public utility. The PAPUC assigned an Administrative Law Judge (ALJ) to adjudicate the matter and submit a recommended decision (Recommended Decision) to the PAPUC. As part of this legal proceeding the PAPUC also issued an Order in January 2021 appointing a large Pennsylvania based investor-owned water utility as the receiver (the Receiver Utility) of the Twin Lakes system until the petition is fully adjudicated by the PAPUC. In November 2021, the PAPUC issued an Order affirming the ALJ’s Recommended Decision, ordering the Receiver Utility to acquire the Twin Lakes water system and for Middlesex, the parent company of Twin Lakes, to submit $1.7 million into an escrow account within 30 days. Twin Lakes immediately filed a Petition For Review (PFR) with the Commonwealth Court of Pennsylvania (the Commonwealth Court) seeking reversal and vacation of the escrow requirement on the grounds that it violates the Pennsylvania Public Utility Code as well as the United States Constitution. In addition, Twin Lakes filed an emergency petition for stay of the PAPUC Order pending the Commonwealth Court’s review of the merits arguments contained in Twin Lakes’ PFR. In December 2021, the Commonwealth Court granted Twin Lakes’ emergency petition, pending its review. In August 2022, the Commonwealth Court issued an opinion upholding PAPUC’s November 2021 Order in its entirety. In September 2022, Twin Lakes filed a Petition For Allowance of Appeal (Appeal Petition) to the Supreme Court of Pennsylvania seeking reversal of the Commonwealth Court’s decision to uphold the escrow requirement on the grounds that the Commonwealth Court erred in failing to address Twin Lakes’ claims that because the $1.7 million escrow requirement placed on Middlesex violated Middlesex’s constitutional rights, Middlesex’s refusal to submit this escrow payment so as not to surrender its constitutional rights would jeopardize the relief Twin Lakes was otherwise entitled to in the appointment of the Receiver Utility. In March 2023, the Supreme Court of Pennsylvania issued a decision denying Twin Lakes’ Appeal Petition without addressing this claim on the merits. As a result of the Pennsylvania Courts’ failure to address Twin Lakes’ claim, Middlesex has subsequently filed a Complaint with the United States District Court for the Middle District of Pennsylvania to address the issue of whether the PAPUC’s Order violated Middlesex’s rights under the United States Constitution. The financial results, total assets and financial obligations of Twin Lakes are not material to Middlesex.

Rate and Regulatory Matters

3 Months Ended

Mar. 31, 2023

Note 2 – Rate and Regulatory Matters

Middlesex – In December 2021, Middlesex’s base rate case was concluded, by negotiated settlement, resulting in an expected increase in annual operating revenues of $27.7 million. The increase was implemented in two phases with $20.7 million of the increase effective January 1, 2022 and the remaining $7.0 million effective January 1, 2023. As part of the settlement, the Purchased Water Adjustment Clause (PWAC), which is a rate mechanism that allows for recovery of increased purchased water costs between base rate case filings, was reset to zero.

In September 2022, the NJBPU approved Middlesex's Emergency Relief Motion to reset its PWAC tariff rate to recover additional costs of $2.7 million for the purchase of treated water from a non-affiliated water utility. The increase, effective October 1, 2022, is on an interim basis and subject to refund with interest, pending final resolution of this matter, which is expected in the second quarter of 2023.

Pinelands – On April 12, 2023, Pinelands Water and Pinelands Wastewater concluded their base rate case matters when the NJBPU approved a combined $1.0 million increase in base rates, effective April 15, 2023. The requests were necessitated by capital infrastructure investments the companies have made as well as increased operations and maintenance costs.

Twin Lakes Utilities, Inc. (Twin Lakes) – Twin Lakes provides water services to approximately 115 residential customers in Shohola, Pennsylvania. Pursuant to the Pennsylvania Public Utility Code, Twin Lakes filed a petition requesting the Pennsylvania Public Utilities Commission (PAPUC) to order the acquisition of Twin Lakes by a capable public utility. The PAPUC assigned an Administrative Law Judge (ALJ) to adjudicate the matter and submit a recommended decision (Recommended Decision) to the PAPUC. As part of this legal proceeding the PAPUC also issued an Order in January 2021 appointing a large Pennsylvania based investor-owned water utility as the receiver (the Receiver Utility) of the Twin Lakes system until the petition is fully adjudicated by the PAPUC. In November 2021, the PAPUC issued an Order affirming the ALJ’s Recommended Decision, ordering the Receiver Utility to acquire the Twin Lakes water system and for Middlesex, the parent company of Twin Lakes, to submit $1.7 million into an escrow account within 30 days. Twin Lakes immediately filed a Petition For Review (PFR) with the Commonwealth Court of Pennsylvania (the Commonwealth Court) seeking reversal and vacation of the escrow requirement on the grounds that it violates the Pennsylvania Public Utility Code as well as the United States Constitution. In addition, Twin Lakes filed an emergency petition for stay of the PAPUC Order pending the Commonwealth Court’s review of the merits arguments contained in Twin Lakes’ PFR. In December 2021, the Commonwealth Court granted Twin Lakes’ emergency petition, pending its review. In August 2022, the Commonwealth Court issued an opinion upholding PAPUC’s November 2021 Order in its entirety. In September 2022, Twin Lakes filed a Petition For Allowance of Appeal (Appeal Petition) to the Supreme Court of Pennsylvania seeking reversal of the Commonwealth Court’s decision to uphold the escrow requirement on the grounds that the Commonwealth Court erred in failing to address Twin Lakes’ claims that because the $1.7 million escrow requirement placed on Middlesex violated Middlesex’s constitutional rights, Middlesex’s refusal to submit this escrow payment so as not to surrender its constitutional rights would jeopardize the relief Twin Lakes was otherwise entitled to in the appointment of the Receiver Utility. In March 2023, the Supreme Court of Pennsylvania issued a decision denying Twin Lakes’ Appeal Petition without addressing this claim on the merits. As a result of the Pennsylvania Courts’ failure to address Twin Lakes’ claim, Middlesex has subsequently filed a Complaint with the United States District Court for the Middle District of Pennsylvania to address the issue of whether the PAPUC’s Order violated Middlesex’s rights under the United States Constitution.

The financial results, total assets and financial obligations of Twin Lakes are not material to Middlesex.