This grant agreement, funded by the infrastructure investment and jobs act (IIJA) (PL 117-58), provides financial assistance to the DC water and sewer authority to replace approximately 8.2 miles of…

Award Summary

The Environmental Protection Agency (EPA) Region 3 awarded a $7.86 million Formula Grant to DC Water & Sewer Authority under the Drinking Water State Revolving Fund program (CFDA 66.468) on October 1, 2025, to replace approximately 8.2 miles of small diameter (12-inch and smaller), unlined cast iron water pipes throughout Washington, D.C. The project consists of two contracts: Small Diameter Water Main Replacement Contract 21A (5.14 miles) and Small Diameter Water Main Replacement Contract 21B (3.03 miles). These unlined cast iron pipes create potential habitat for harmful microbes, including Legionella, which can compromise drinking water quality and public health.

The grant directly supports the Safe Drinking Water Act's public health protection objectives by addressing emerging microbial contaminants and improving the quality, quantity, reliability, and safety of drinking water supplied to District residents. The recipient will perform all project work directly with no sub-awardees, with an ultimate completion date of August 30, 2032. This infrastructure improvement aligns with the Infrastructure Investment and Jobs Act (IIJA) funding mechanism and represents a critical component of DC Water & Sewer Authority's ongoing water system modernization efforts.

This grant agreement, funded by the infrastructure investment and jobs act (IIJA) (PL 117-58), provides financial assistance to the DC water and sewer authority to replace approximately 8.2 miles of small diameter, unlined cast iron water pipes at various locations in the district of columbia which can provide potential habitat for harmful microbes. The award furthers the public health protection objectives of the safe drinking water act. Activities:the recipient will utilize this funding to replace approximately 5.14 miles of small diameter (12-inch and smaller), unlined, cast iron water pipes under small diameter water main replacement contract 21A and approximately 3.03 miles of small diameter, unlined cast iron water pipes under small diameter water main replacement contract 21B. Unlined cast iron water pipes can provide potential habitat for harmful microbes. The replacement of these unlined cast iron pipes is necessary to ensure the quality, quantity, reliability, and safety of the drinking water supplied to the people of the district of columbia. Subrecipient:no subawards are included in this assistance agreement.outcomes:the anticipated deliverable includes the replacement of approximately 5.14 miles of small diameter, unlined cast iron water pipes under 'small diameter water main replacement contract 21A' and approximately 3,03 miles of small diameter, unlined cast iron water pipes under 'small diameter water main replacement contract 21B'. This funding will address an emerging microbial contaminant that grows on the interior walls of unlined cast iron pipes in these segments. The grant will provide a safer drinking water supply for the residents of the district of columbia.