DOUGLAS CITY OF: EPA violation history, explained
DOUGLAS CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 16,656 people get their water from it, across 6,230 connections.
How this compares nationally
840 total violations and 28 health-based ones put DOUGLAS CITY OF at the 95th percentile nationally for violation burden, rank 608 of 12,903.
How DOUGLAS CITY OF compares within AZ
Among the 199 AZ systems in this dataset, the average is 8.2 health-based violations - DOUGLAS CITY OF's 28 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for DOUGLAS CITY OF is from 2025-02-10 (health-based: 2015-01-11). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
DOUGLAS CITY OF'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)
- Other regulated metals - flagged from: Arsenic
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 DOUGLAS CITY OF's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 28 health-based violations on file for DOUGLAS CITY OF - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.