LA PLATA, Md. — The Maryland Department of the Environment has approved the removal of the Charles County portion of the non-tidal Lower Patuxent River Watershed from the state’s impaired waters list for sediment.
The delisting follows four years of environmental monitoring by Charles County. After a comprehensive technical review, the Maryland Department of the Environment confirmed that this watershed segment meets Maryland’s Water Quality Standards. It will be reclassified as Category 2 in the state’s 2026 Integrated Report, indicating good biological condition.
“This achievement demonstrates our ongoing commitment to protecting and restoring local waterways,” said Charles R. Rice, AICP, Planning Director of Planning and Growth Management. “Healthy watersheds are vital to our environment, economy, and quality of life, and we are proud to see this portion of the Lower Patuxent River officially recognized for its biological quality.”
The decision, announced in News Release 2026-041, shifts restoration resources to other Charles County watersheds where sediment reduction and habitat improvements will yield greater benefits. County officials plan continued monitoring to maintain water quality in the non-tidal Lower Patuxent River Watershed for years ahead.
Charles County’s Watershed Protection and Restoration Program conducted successive sampling events in 2023 and 2024. These efforts produced fish index of biotic integrity scores above the impairment threshold of 3.00, signaling high water quality and supporting the delisting justification submitted to the Maryland Department of the Environment.
The Lower Patuxent River flows through Southern Maryland, including portions of Charles County, before reaching the Chesapeake Bay. Removing the sediment impairment designation for the county’s non-tidal segment marks progress in local efforts to protect tributaries that support recreation, wildlife and regional water quality.
County leaders emphasized science-based monitoring, strategic planning and partnerships with state and regional agencies. The delisting aligns with broader Chesapeake Bay restoration goals by focusing limited resources where they deliver the most impact.
Charles County has protected thousands of acres through parks, natural resource areas, transfer of development rights, Maryland Agricultural Land Preservation Fund properties and forest conservation easements. These protections help reduce sediment runoff alongside stormwater management practices such as rain gardens.
The Maryland Department of the Environment maintains oversight of surface water quality standards and the Integrated Report process. Delisting requires rigorous data demonstrating sustained compliance with biological and physical criteria.
Southern Maryland residents benefit from cleaner streams that support fishing, boating and healthy ecosystems. The Patuxent River system serves as a key ecological corridor in the region, and this milestone reflects years of coordinated local and state work.
Officials will continue watershed assessments across Charles County to identify priorities for future restoration projects. The county’s commitment includes collaboration on stormwater programs, education for homeowners and compliance with National Pollutant Discharge Elimination System permits.
For details on Maryland’s Surface Water Quality Standards, refer to the Maryland Department of the Environment website. Charles County planning and environmental staff remain available for questions about local watershed efforts.
This delisting contributes to measurable improvements in Southern Maryland waterways. It demonstrates how consistent monitoring and targeted actions can produce tangible environmental gains in communities south of Washington, D.C.
As the 2026 Integrated Report takes shape, the reclassification of this Lower Patuxent segment highlights successful collaboration between Charles County and the Maryland Department of the Environment. Residents can expect ongoing updates on watershed health as monitoring programs advance.
