What's in DERBY, CITY OF's water?
DERBY, CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 25,413, over 10,230 connections.
How this compares nationally
DERBY, CITY OF has 23 violations on record in total, 11 of thems health-based - ranking it 1,785th of 12,903 systems by violation count, the 86th percentile nationally.
How DERBY, CITY OF compares within KS
KS's 152 covered systems average 8.7 health-based violations each; DERBY, CITY OF carries 11, more than typical for the state. 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 DERBY, CITY OF is from 2022-06-10 (health-based: 2013-01-01). Last reported to EPA: 05/15/2026.
What kind of problem, specifically
DERBY, CITY OF'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)
- Other regulated metals - flagged from: Selenium
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 DERBY, CITY OF's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 11 health-based violations on file for DERBY, CITY OF - 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.