What's in WATER & SEWER COMMISSION 4 OF ST MARY's water?
WATER & SEWER COMMISSION 4 OF ST MARY had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 9,709 people get their water from it, across 3,011 connections.
WATER & SEWER COMMISSION 4 OF ST MARY's record against the rest of the country
WATER & SEWER COMMISSION 4 OF ST MARY has 17 violations on record in total, 15 of thems health-based - ranking it 1,279th of 12,903 systems by violation count, the 90th percentile nationally.
How WATER & SEWER COMMISSION 4 OF ST MARY compares within LA
LA's 347 covered systems average 12.6 health-based violations each; WATER & SEWER COMMISSION 4 OF ST MARY carries 15, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for WATER & SEWER COMMISSION 4 OF ST MARY is from 2025-01-01 (health-based: 2025-01-01). Last reported to EPA: 06/23/2026.
What kind of problem, specifically
WATER & SEWER COMMISSION 4 OF ST MARY'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
Everything on this page is WATER & SEWER COMMISSION 4 OF ST MARY's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 17 logged violations can see. The guide to what this data misses covers that gap.