What's in DAYTON, CITY OF's water?

DAYTON, 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: 2,535, over 904 connections.

How this compares nationally

DAYTON, CITY OF has 95 violations on record in total, 5 of thems health-based - ranking it 3,369th of 12,903 systems by violation count, the 74th percentile nationally.

How DAYTON, CITY OF compares within OR

OR's 160 covered systems average 6.0 health-based violations each; DAYTON, CITY OF carries 5, not 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 DAYTON, CITY OF is from 2024-01-07 (health-based: 2018-01-11). Last reported to EPA: 06/26/2026.

What kind of problem, specifically

DAYTON, 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); Groundwater Rule

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 DAYTON, CITY OF 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 95 logged violations can see. The guide to what this data misses covers that gap.