DrinkingWaterCheck

MESA CITY OF: EPA violation history, explained

MESA CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 466,000 people get their water from it, across 142,500 connections.

Ranked against every other system in this dataset

Out of 12,903 systems in this dataset, MESA CITY OF ranks 4,597th by violation burden (64th percentile) - 1,579 violations total, 3 health-baseds.

Against the AZ average

Among the 199 AZ systems in this dataset, the average is 8.2 health-based violations - MESA CITY OF's 3 is at or below that. The clean-record guide covers what a comparison like this can hide.

Most recent violation on record

MESA CITY OF's most recent violation on record is dated 2025-01-08, with the most recent health-based one dated 2003-01-01. Last reported to EPA: 05/14/2026.

The concern categories on record

MESA 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:

The most severe category on record is nitrate / nitrite, which points toward a reverse osmosis-class filter if you want to address it directly.

What MESA CITY OF's record does not cover

MESA 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. This record - 3 health-based violations on file for MESA 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.