Top 10 US States by Drinking Water Act Violations
EPA Safe Drinking Water Information System (SDWIS) data ranking all US states by total drinking water act violations.
Research
Original data research from the PlainWater. Every number here is pulled directly from our live database; nothing is hardcoded.
class="text-gray-900 dark:text-gray-100 hover:text-[var(--color-accent, #c2410c)]">Top 10 PFAS Contaminants by Detection Rate in US Drinking Water
EPA UCMR5 (Unregulated Contaminant Monitoring Rule, fifth cycle) data ranks per- and polyfluoroalkyl substances (PFAS) by the share of public-water-system samples in which each compound was detected at or above the minimum reporting level.
class="text-gray-900 dark:text-gray-100 hover:text-[var(--color-accent, #c2410c)]">Top 10 US States by PFAS Detection Rate in Public Water Systems
EPA UCMR5 PFAS occurrence data aggregated to the state level, rates reflect the share of tested public water systems in each state with at least one PFAS analyte detected at or above the minimum reporting level.
Download the SDWIS/UCMR5 state landscape snapshot cited on this page: sdwis-state-landscape.csv (same CSV as /statistics, CC0).