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Environmental Commitments and Contingencies | 6 Months Ended
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Jun. 30, 2025
Environmental Remediation Obligations [Abstract] |
Environmental Commitments and Contingencies | Environmental Commitments and Contingencies We are subject to federal, state and local laws and regulations governing environmental quality and pollution control. These laws and regulations require us to remove or remediate, at current and former operating sites, the effect on the environment of the disposal or release of specified substances. MGP Sites We have participated in the investigation, assessment or remediation of, and have exposures at, seven former MGP sites. We have received approval for recovery of clean-up costs in rates for sites located in Salisbury, Maryland; Seaford, Delaware; and Winter Haven, Key West, Pensacola, Sanford and West Palm Beach, Florida. As of June 30, 2025 and December 31, 2024, we had approximately $3.1 million and $3.2 million, respectively, in environmental liabilities related to the former MGP sites, and related regulatory assets of approximately $0.3 million and $0.3 million at the respective balance sheet dates for future recovery of environmental costs from customers. Environmental liabilities for our MGP sites are recorded on an undiscounted basis based on the estimate of future costs provided by independent consultants. We continue to expect that all costs related to environmental remediation and related activities, including any potential future remediation costs for which we do not currently have approval for regulatory recovery, will be recoverable from customers through rates. Remediation is ongoing for the MGPs in Winter Haven and Key West, Florida and in Seaford, Delaware. The remaining clean-up costs are estimated to range from $0.3 million to $0.8 million for these three sites. The Environmental Protection Agency has approved a "site-wide ready for anticipated use" status for the Sanford, Florida MGP site, which is the final step before delisting a site. The remaining remediation expenses for the Sanford MGP site are not material. The remedial actions approved by the Florida Department of Environmental Protection have been implemented on the east parcel of our West Palm Beach, Florida site. Similar remedial actions have been initiated on the site's west parcel, and construction of the systems required to remediate the site are now complete with remediation activities ongoing as of June 30, 2025. Remaining remedial costs for West Palm Beach, including completion of the construction for the system start-up on the west parcel, and continued operation and maintenance, are estimated to take between five and fifteen years of operation, maintenance and monitoring, and final site work for closeout of the property is estimated to be between $2.8 million and $5.2 million.

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