TONASKET WATER SYSTEM: EPA violation history, explained
TONASKET WATER SYSTEM has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 2,398 people through 602 service connections.
How this compares nationally
TONASKET WATER SYSTEM has 19 violations on record in total, 4 of thems health-based - ranking it 4,216th of 12,903 systems by violation count, the 67th percentile nationally.
Against the WA average
WA's 322 covered systems average 3.7 health-based violations each; TONASKET WATER SYSTEM carries 4, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
TONASKET WATER SYSTEM's most recent violation on record is dated 2020-01-10, with the most recent health-based one dated 1998-01-11. Last reported to EPA: 06/19/2026.
The concern categories on record
TONASKET WATER SYSTEM's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What TONASKET WATER SYSTEM's record does not cover
Everything on this page is TONASKET WATER SYSTEM's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and TONASKET WATER SYSTEM's customers' taps is household plumbing, invisible to a system-level record ranked 4,216th of 12,903 by violation count. The guide to what this data misses covers that gap.