Use this directory to open U.S. city-specific tap water pages with local water systems, open EPA SDWIS violations, and ZIP-based service area approximations. Select a city below to view its detailed page.
U.S. City Pages
87
Major U.S. city tap water profiles
Water Systems Covered
3,067
Public water systems mapped to these city pages
States Covered
41
U.S. states represented in the dataset
Systems With Open Health Issues
112
Distinct systems with currently open health-based violations
Population Covered
73,869,488
Approximate population served across mapped systems
Open Tier 1 Notices
0
Highest-urgency open public notification notices
Health-Risk System Share
3.7%
Share of mapped systems currently in red status
Open Health-Based Share
6.9%
Share of open violations that are health-based
Population In Red Systems
1,718,882
Approximate population served by systems in red status
Coverage is focused on major U.S. cities with city-level tap water detail pages.