Is ST JOHN WATER DISTRICT 1's water safe to drink?
ST JOHN WATER DISTRICT 1 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 10,484 people through 3,494 service connections.
Ranked against every other system in this dataset
69 total violations and 55 health-based ones put ST JOHN WATER DISTRICT 1 at the 98th percentile nationally for violation burden, rank 238 of 12,903.
Against the LA average
ST JOHN WATER DISTRICT 1's 55 health-based violations sit above the LA average of 12.6, across 347 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
ST JOHN WATER DISTRICT 1's most recent violation on record is dated 2026-03-09, with the most recent health-based one dated 2019-01-06. Last reported to EPA: 06/23/2026.
The concern categories on record
ST JOHN WATER 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: Coliform (TCR); Interim Enhanced Surface Water Treatment Rule; Long Term 2 Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
- Synthetic organic chemicals / pesticides / VOCs - flagged from: CARBON, TOTAL
- 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 ST JOHN WATER DISTRICT 1's record does not cover
This is what ST JOHN WATER DISTRICT 1 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 69 logged violations can see. The guide to what this data misses covers that gap.