Is NOGALES CITY OF's water safe to drink?
NOGALES 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. Population served: 22,000, over 5,400 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, NOGALES CITY OF ranks 758th by violation burden (94th percentile) - 1,230 violations total, 23 health-baseds.
How NOGALES CITY OF compares within AZ
Among the 199 AZ systems in this dataset, the average is 8.2 health-based violations - NOGALES CITY OF's 23 is above that. 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 NOGALES CITY OF is from 2026-04-04 (health-based: 2025-05-10). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
NOGALES 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:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Groundwater Rule; Revised Total Coliform Rule
- Other regulated metals - flagged from: Arsenic; Asbestos
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
NOGALES CITY OF'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 NOGALES CITY OF's customers' taps is household plumbing, invisible to a system-level record ranked 758th of 12,903 by violation count. The guide to what this data misses covers that gap.