Epcor - Tierra Del Rio, AZ Water Quality
Is Epcor - Tierra Del Rio's water safe to drink?
Epcor - Tierra Del Rio has at least one health-based violation EPA's own compliance-tracking system still lists as unaddressed - the required fix has not been reported complete. 4,868 people get their water from it, across 1,770 connections.
Epcor - Tierra Del Rio's record against the rest of the country
Out of 12,903 systems in this dataset, Epcor - Tierra Del Rio ranks 6,871th by violation burden (47th percentile) - 5 violations total, 2 health-based.
Against the AZ average
Among the 210 AZ systems in this dataset, the average is 8.0 health-based violations - Epcor - Tierra Del Rio's 2 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
Epcor - Tierra Del Rio's most recent violation on record is dated 2026-05-09, with the most recent health-based one dated 2026-05-09. Last reported to EPA: 05/14/2026.
The concern categories on record
Epcor - Tierra Del Rio'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: 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 Epcor - Tierra Del Rio's record does not cover
Everything on this page is Epcor - Tierra Del Rio's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 5 logged violations can see. The guide to what this data misses covers that gap.