ADA: EPA violation history, explained
ADA had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 22,600, over 11,575 connections.
How this compares nationally
ADA has 14 violations on record in total, 3 of thems health-based - ranking it 5,141th of 12,903 systems by violation count, the 60th percentile nationally.
How ADA compares within OK
ADA's 3 health-based violations sit within the OK average of 39.5, across 240 systems statewide. 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 ADA is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/13/2026.
What kind of problem, specifically
ADA'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:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
ADA'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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 14 logged violations can see. The guide to what this data misses covers that gap.