Download Water Violation Data

Free CSV downloads of EPA drinking water violation data, organized by state. Each file contains all violations on record for water systems in that state, with system details included.

For researchers, journalists, and developers. This data is sourced from the EPA's Safe Drinking Water Information System (SDWIS) and is in the public domain.

CSV Fields

Each row is one violation. Columns:

pwsid, system_name, state, city, population, water_source,
contaminant_code, contaminant_name, violation_name,
health_based, major, begin_date, end_date,
compliance_status, measure, unit, rule_name

Download by State

Cite This Data

WaterViolations.org. Data from U.S. EPA Safe Drinking Water
Information System (SDWIS). https://waterviolations.org/data

Also Available

JSON API — look up systems and violations programmatically, no API key needed.