What's in ARIZONA WATER CO - SIERRA VISTA's water?
ARIZONA WATER CO - SIERRA VISTA 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 9,175 people through 3,245 service connections.
How this compares nationally
ARIZONA WATER CO - SIERRA VISTA has 78 violations on record in total, 2 of thems health-based - ranking it 5,815th of 12,903 systems by violation count, the 55th percentile nationally.
Against the AZ average
Among the 199 AZ systems in this dataset, the average is 8.2 health-based violations - ARIZONA WATER CO - SIERRA VISTA's 2 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
ARIZONA WATER CO - SIERRA VISTA's most recent violation on record is dated 2025-05-10, with the most recent health-based one dated 2025-05-10. Last reported to EPA: 05/14/2026.
The concern categories on record
ARIZONA WATER CO - SIERRA VISTA'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)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What ARIZONA WATER CO - SIERRA VISTA's record does not cover
This is what ARIZONA WATER CO - SIERRA VISTA 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 78 logged violations can see. The guide to what this data misses covers that gap.