Is WASHINGTON WATER AUTHORITY WWA's water safe to drink?
WASHINGTON WATER AUTHORITY WWA has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 20,140 people get their water from it, across 8,056 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, WASHINGTON WATER AUTHORITY WWA ranks 1,245th by violation burden (90th percentile) - 28 violations total, 15 health-baseds.
Against the AR average
Among the 243 AR systems in this dataset, the average is 7.1 health-based violations - WASHINGTON WATER AUTHORITY WWA's 15 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
WASHINGTON WATER AUTHORITY WWA's most recent violation on record is dated 2019-01-10, with the most recent health-based one dated 2019-01-01. Last reported to EPA: 05/12/2026.
The concern categories on record
WASHINGTON WATER AUTHORITY WWA'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)
- Disinfection byproducts - flagged from: TTHM
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 WASHINGTON WATER AUTHORITY WWA's record does not cover
WASHINGTON WATER AUTHORITY WWA's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and WASHINGTON WATER AUTHORITY WWA's customers' taps is household plumbing, invisible to a system-level record ranked 1,245th of 12,903 by violation count. The guide to what this data misses covers that gap.