What's in YAK CO - TERRACE HEIGHTS's water?
YAK CO - TERRACE HEIGHTS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 8,410 people get their water from it, across 2,725 connections.
Ranked against every other system in this dataset
57 total violations and 2 health-based ones put YAK CO - TERRACE HEIGHTS at the 54th percentile nationally for violation burden, rank 5,884 of 12,903.
How YAK CO - TERRACE HEIGHTS compares within WA
WA's 322 covered systems average 3.7 health-based violations each; YAK CO - TERRACE HEIGHTS carries 2, not more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for YAK CO - TERRACE HEIGHTS is from 2025-01-01 (health-based: 2023-01-08). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
YAK CO - TERRACE HEIGHTS'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); Revised Total Coliform Rule
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 this data is and is not
Everything on this page is YAK CO - TERRACE HEIGHTS'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 YAK CO - TERRACE HEIGHTS's customers' taps is household plumbing, invisible to a system-level record ranked 5,884th of 12,903 by violation count. The guide to what this data misses covers that gap.