CITY OF STOCKTON: EPA violation history, explained
CITY OF STOCKTON had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 191,302, over 51,522 connections.
How this compares nationally
Out of 12,903 systems in this dataset, CITY OF STOCKTON ranks 3,737th by violation burden (71th percentile) - 10 violations total, 5 health-baseds.
Against the CA average
CA's 803 covered systems average 5.8 health-based violations each; CITY OF STOCKTON carries 5, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
CITY OF STOCKTON's most recent violation on record is dated 2024-01-01, with the most recent health-based one dated 2023-01-04. Last reported to EPA: 06/22/2026.
The concern categories on record
CITY OF STOCKTON'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
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 CITY OF STOCKTON's record does not cover
CITY OF STOCKTON's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and CITY OF STOCKTON's customers' taps is household plumbing, invisible to a system-level record ranked 3,737th of 12,903 by violation count. The guide to what this data misses covers that gap.