Data gathered about the bacteria levels in local river water have put several swimming and boating spots in the safe or concerning category on a national water safety registry.
The Potomac RiverKeeper Network contributes water samples regularly in the regional watershed. Their last sampling on July 18, 2025 showed trouble spots on the Potomac River, with higher levels of bacteria near the riverbank in several areas, including Williamsport, Md. and Shepherdstown, W.Va. Results are shown on the nationwide water recreation site, www.theswimguide.org.
