DrinkingWaterCheck

JEFFERSON CO RWD 1: EPA violation history, explained

JEFFERSON CO RWD 1 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 2,343, over 1,003 connections.

JEFFERSON CO RWD 1's record against the rest of the country

36 total violations and 14 health-based ones put JEFFERSON CO RWD 1 at the 90th percentile nationally for violation burden, rank 1,353 of 12,903.

Against the KS average

KS's 152 covered systems average 8.7 health-based violations each; JEFFERSON CO RWD 1 carries 14, more than typical for the state. The filter guide explains what a violation like this actually calls for.

Most recent violation on record

JEFFERSON CO RWD 1's most recent violation on record is dated 2021-12-05, with the most recent health-based one dated 2014-01-07. Last reported to EPA: 05/15/2026.

The concern categories on record

JEFFERSON CO RWD 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:

The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.

What JEFFERSON CO RWD 1's record does not cover

This is what JEFFERSON CO RWD 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. This record - 14 health-based violations on file for JEFFERSON CO RWD 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.