What's in TEMPE CITY OF's water?
TEMPE CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 165,000 people get their water from it, across 40,000 connections.
How this compares nationally
Out of 12,903 systems in this dataset, TEMPE CITY OF ranks 5,651th by violation burden (56th percentile) - 302 violations total, 2 health-baseds.
How TEMPE CITY OF compares within AZ
AZ's 199 covered systems average 8.2 health-based violations each; TEMPE CITY OF carries 2, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for TEMPE CITY OF is from 2018-01-01 (health-based: 2017-01-10). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
TEMPE 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:
- Microbial contamination / treatment technique - flagged from: Long Term 2 Enhanced Surface Water Treatment Rule
- Disinfection byproducts - flagged from: TTHM
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 this data is and is not
This is what TEMPE CITY OF 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 - 2 health-based violations on file for TEMPE 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.