HOLBROOK CITY OF: EPA violation history, explained
HOLBROOK CITY OF had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 4,833 people through 2,002 service connections.
HOLBROOK CITY OF's record against the rest of the country
148 total violations and 3 health-based ones put HOLBROOK CITY OF at the 64th percentile nationally for violation burden, rank 4,672 of 12,903.
Against the AZ average
AZ's 199 covered systems average 8.2 health-based violations each; HOLBROOK CITY OF carries 3, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
HOLBROOK CITY OF's most recent violation on record is dated 2026-01-01, with the most recent health-based one dated 2023-09-07. Last reported to EPA: 05/14/2026.
The concern categories on record
HOLBROOK 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); Groundwater 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 HOLBROOK CITY OF's record does not cover
This is what HOLBROOK CITY OF reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and HOLBROOK CITY OF's customers' taps is household plumbing, invisible to a system-level record ranked 4,672th of 12,903 by violation count. The guide to what this data misses covers that gap.