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Potomac Wastewater Mapper in Pennsylvania

By Pennsylvania Water Science Center June 9, 2025

Screenshot of Potomac Wastewater Mapper showing part of basin in Pennsylvania with river sections colored

Detailed Description

This map shows streams impacted by discharges of treated municipal and industrial wastewater (as accumulated wastewater in percent of total streamflow, ACCWW%), based on 2016 wastewater flows. This is a screenshot from the USGS Potomac Wastewater Mapper.

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Public Domain.

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March 6, 2023

Interactive Map: Potomac Wastewater Mapper Interactive Map: Potomac Wastewater Mapper

The Potomac Wastewater Mapper is intended to help identify streams with elevated wastewater conditions or predicted ecological risk posed by municipal effluent-derived wastewater mixtures that may require further attention by resource managers, either through targeted contaminant monitoring and sampling or wastewater treatment plant upgrades to improve contaminant removal.

Virginia and West Virginia Water Science Center