State rankings

Washington water-system rankings

Community water systems in Washington ranked by PurityRadar safety score — from EPA violations, enforcement, and PFAS data.

Lowest-scoring systems in Washington

Ranked lowest score first. Population shown for context.

No scored community water systems found for Washington.

Washington directory → All states

Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.