What's in JEFFERSON COUNTY PWSD 10's water?

JEFFERSON COUNTY PWSD 10's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 10,000 people get their water from it, across 2,827 connections.

Ranked against every other system in this dataset

2 total violations and 0 health-based ones put JEFFERSON COUNTY PWSD 10 at the 7th percentile nationally for violation burden, rank 11,988 of 12,903.

How JEFFERSON COUNTY PWSD 10 compares within MO

Among the 327 MO systems in this dataset, the average is 6.1 health-based violations - JEFFERSON COUNTY PWSD 10's 0 is at or below that. 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 10 is from 2024-01-04. Last reported to EPA: 06/16/2026.

What this data is and is not

JEFFERSON COUNTY PWSD 10's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 2 logged violations can see. The guide to what this data misses covers that gap.