Is MESA WATER DISTRICT's water safe to drink?
MESA WATER DISTRICT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 110,000 people get their water from it, across 24,436 connections.
How this compares nationally
MESA WATER DISTRICT has 2 violations on record in total, 1 of them health-based - ranking it 9,072th of 12,903 systems by violation count, the 30th percentile nationally.
Against the CA average
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - MESA WATER DISTRICT's 1 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
MESA WATER DISTRICT's most recent violation on record is dated 2010-01-01, with the most recent health-based one dated 2000-01-07. Last reported to EPA: 06/22/2026.
The concern categories on record
MESA WATER DISTRICT'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)
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 MESA WATER DISTRICT's record does not cover
This is what MESA WATER DISTRICT 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. This record - 1 health-based violation on file for MESA WATER DISTRICT - 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.