What's in JEFFERSON COUNTY PWSD 1's water?

JEFFERSON COUNTY PWSD 1's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 21,113 people get their water from it, across 7,554 connections.

How this compares nationally

JEFFERSON COUNTY PWSD 1 has 1 violation on record in total, 0 of thems health-based - ranking it 12,315th of 12,903 systems by violation count, the 5th percentile nationally.

How JEFFERSON COUNTY PWSD 1 compares within MO

Among the 327 MO systems in this dataset, the average is 6.1 health-based violations - JEFFERSON COUNTY PWSD 1's 0 is at or below that. The filter guide explains what a violation like this actually calls for.

What this data is and is not

This is what JEFFERSON COUNTY PWSD 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 1 logged violations can see. The guide to what this data misses covers that gap.