Is OLNEY's water safe to drink?
OLNEY has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 8,877, over 4,061 connections.
Ranked against every other system in this dataset
OLNEY has 5 violations on record in total, 2 of thems health-based - ranking it 6,861th of 12,903 systems by violation count, the 47th percentile nationally.
How OLNEY compares within IL
IL's 560 covered systems average 5.0 health-based violations each; OLNEY carries 2, 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 OLNEY is from 2024-01-04 (health-based: 2007-01-10). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
OLNEY'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)
- Synthetic organic chemicals / pesticides / VOCs - flagged from: CARBON, TOTAL
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 OLNEY 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 - 2 health-based violations on file for OLNEY - 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.