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National Enforcement Initiative: Keeping Raw Sewage and Contaminated Stormwater Out of Our Nation's Waters
Green infrastructure helps reduce the water quality impacts of heavy rains and snow melts and is cost-effective and sustainable. Examples include: green roofs, rain gardens, permeable pavements, and revitalization of vacant lots.
Raw sewage overflows and inadequately controlled stormwater discharges from municipal sewer systems introduce a variety of harmful pollutants, including disease causing organisms, metals and nutrients that threaten our communities' water quality and can contribute to disease outbreaks, beach and shellfish bed closings, flooding, stream scouring, fishing advisories and basement backups of sewage.
EPA is taking enforcement action at municipal sewer systems with Clean Water Act violations to reduce pollution and volume of stormwater runoff and to reduce unlawful discharges of raw sewage that degrade water quality in communities.
EPA will take action to reduce raw sewage overflows and storm water discharges from municipal sewer systems that pose a significant threat to water quality and public health.
Note: This is a sample list of cases.
Progress on Keeping Raw Sewage and Contaminated Stormwater Out of Our Waters
The following maps and charts show EPA's progress in targeting the largest municipalities to reduce stormwater runoff and unlawful discharges of raw sewage.
- Chart showing EPA's progress toward addressing large combined sewer systems with untreated sewage overflows
- Chart showing EPA's progress toward addressing large sanitary sewer systems with untreated sewage overflows
Map of all combined sewer overflow systems (CSO) serving a population of 50,000 or more people
Map of the status of sanitary sewer systems in municipalities with wastewater flow greater than 10 million gallons per day