LAKE ST JOHN WATERWORKS DISTRICT 1: EPA violation history, explained
LAKE ST JOHN WATERWORKS DISTRICT 1 had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 2,067 people through 689 service connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, LAKE ST JOHN WATERWORKS DISTRICT 1 ranks 75th by violation burden (99th percentile) - 123 violations total, 104 health-baseds.
Against the LA average
LA's 347 covered systems average 12.6 health-based violations each; LAKE ST JOHN WATERWORKS DISTRICT 1 carries 104, more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
LAKE ST JOHN WATERWORKS DISTRICT 1's most recent violation on record is dated 2023-01-10, with the most recent health-based one dated 2023-01-10. Last reported to EPA: 06/23/2026.
The concern categories on record
LAKE ST JOHN WATERWORKS DISTRICT 1'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
- 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 LAKE ST JOHN WATERWORKS DISTRICT 1's record does not cover
Everything on this page is LAKE ST JOHN WATERWORKS DISTRICT 1's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 104 health-based violations on file for LAKE ST JOHN WATERWORKS DISTRICT 1 - 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.