Terra Bella Irrigation District - Tbt, CA Water Quality
What's in Terra Bella Irrigation District - Tbt's water?
Terra Bella Irrigation District - Tbt has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 2,656 people get their water from it, across 804 connections.
How this compares nationally
30 total violations and 26 health-based ones put Terra Bella Irrigation District - Tbt at the 95th percentile nationally for violation burden, rank 692 of 12,903.
How Terra Bella Irrigation District - Tbt compares within CA
Among the 804 CA systems in this dataset, the average is 5.8 health-based violations - Terra Bella Irrigation District - Tbt's 26 is above 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 Terra Bella Irrigation District - Tbt is from 2024-01-10 (health-based: 2017-01-04). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
Terra Bella Irrigation District - Tbt'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); Surface Water Treatment Rule
- Disinfection byproducts - flagged from: Tthm; Total Haloacetic Acids (HAA5)
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 Terra Bella Irrigation District - Tbt 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 - 26 health-based violations on file for Terra Bella Irrigation District - Tbt - 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.