Is JEFFERSON COUNTY PWSD 7's water safe to drink?
JEFFERSON COUNTY PWSD 7 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 6,100 people through 2,596 service connections.
JEFFERSON COUNTY PWSD 7's record against the rest of the country
Out of 12,903 systems in this dataset, JEFFERSON COUNTY PWSD 7 ranks 8,730th by violation burden (32th percentile) - 5 violations total, 1 health-based.
How JEFFERSON COUNTY PWSD 7 compares within MO
MO's 327 covered systems average 6.1 health-based violations each; JEFFERSON COUNTY PWSD 7 carries 1, not 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 JEFFERSON COUNTY PWSD 7 is from 2025-05-10 (health-based: 2011-01-06). Last reported to EPA: 06/16/2026.
What kind of problem, specifically
JEFFERSON COUNTY PWSD 7'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
This is what JEFFERSON COUNTY PWSD 7 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. This record - 1 health-based violation on file for JEFFERSON COUNTY PWSD 7 - 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.