Keeping Raw Sewage and Contaminated Stormwater Out of Our Nation's Waters
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.
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.
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.
Progress on Enforcement and Compliance Activities
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 cumulative progress toward addressing sanitary sewer systems with untreated sewage overflows
- Green Infrastructure
- EPA Memorandum: Protecting Water Quality with Green Infrastructure in EPA Water Permitting and Enforcement Programs (PDF) (5 pp, 343K, About PDF)
- Integrated Municipal Stormwater and Wastewater Planning Approach Framework (PDF) (9 pp, 396K, About PDF)
- Sustainable Water Infrastructure
- Stormwater discharges from Municipal Separate Storm Sewer Systems
- Combined Sewer Overflows
- CSO Control Policy
- Sanitary Sewer Overflows and Peak Flows