3899.1 When used in this chapter, the following words and phrases shall have the meanings ascribed:

Act – the Lead Service Line Priority Replacement Assistance Act of 2004, effective March 13, 2019 (D.C. Law 22-241; D.C. Official Code § 34-2159).

Authorizing Authority – the owner(s) or the party that the building owner(s) or homeowner(s) of a multi-family property have authorized to act on their behalf for purposes of the LPRAP, such as the building management for a cooperative housing association or condominium building.

DC Water – the District of Columbia Water and Sewer Authority.

Department – the District of Columbia Department of Energy and Environment.

Eligible portion of the lead service line – the portion of the lead water service line located on private property and/or any portion of the lead water service line remaining on public property after a partial lead service line replacement.

LPRAP – The Lead Pipe Replacement Assistance Program that provides eligible households with assistance for the replacement of partial lead service lines on private property and is administered by DC Water and the Department.

Multi-Family Property – a residential property (such as an apartment, condominium, or cooperative housing association) used for domestic purposes, with two or more single-family, apartment, condominium, or cooperative housing association residential dwelling units.

Partial Lead Service Line – the lead water service line that remains after a partial replacement where a portion or all of the lead water service line in public space is replaced with a nonlead water service line from the watermain to the property line.

Replacement Costs – exploratory, construction, and restoration costs incurred under the LPRAP.

SOURCE: Final Rulemaking published at 67 DCR 2597 (March 6, 2020); as amended by Final Rulemaking published at 72 DCR 008203 (July 25, 2025).