Is Tuba City NTUA's water safe to drink?
Tuba City NTUA has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 6,276 people get their water from it, across 1,835 connections.
Tuba City NTUA's record against the rest of the country
57 total violations and 3 health-based ones put Tuba City NTUA at the 63th percentile nationally for violation burden, rank 4,782 of 12,903.
How Tuba City NTUA compares within AZ
Among the 199 AZ systems in this dataset, the average is 8.2 health-based violations - Tuba City NTUA's 3 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for Tuba City NTUA is from 2020-01-01 (health-based: 2001-01-12). Last reported to EPA: 06/23/2026.
What kind of problem, specifically
Tuba City NTUA'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 this data is and is not
Everything on this page is Tuba City NTUA's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 3 health-based violations on file for Tuba City NTUA - 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.