Is JEFFERSON CO CONS PWSD C 1's water safe to drink?
JEFFERSON CO CONS PWSD C 1 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 37,000 people get their water from it, across 14,920 connections.
How this compares nationally
Out of 12,903 systems in this dataset, JEFFERSON CO CONS PWSD C 1 ranks 9,090th by violation burden (30th percentile) - 2 violations total, 1 health-based.
How JEFFERSON CO CONS PWSD C 1 compares within MO
Among the 327 MO systems in this dataset, the average is 6.1 health-based violations - JEFFERSON CO CONS PWSD C 1's 1 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for JEFFERSON CO CONS PWSD C 1 is from 2010-01-02 (health-based: 2010-01-02). Last reported to EPA: 06/16/2026.
What kind of problem, specifically
JEFFERSON CO CONS PWSD C 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)
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 JEFFERSON CO CONS PWSD C 1's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 1 health-based violation on file for JEFFERSON CO CONS PWSD C 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.