What's in EUREKA's water?
EUREKA has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 5,216 people get their water from it, across 2,278 connections.
Ranked against every other system in this dataset
44 total violations and 20 health-based ones put EUREKA at the 93th percentile nationally for violation burden, rank 890 of 12,903.
How EUREKA compares within IL
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - EUREKA's 20 is above that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for EUREKA is from 2024-01-01 (health-based: 1995-01-02). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
EUREKA'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Nitrate / nitrite - flagged from: Nitrate
- Microbial contamination / treatment technique - flagged from: Surface Water Treatment Rule
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is EUREKA's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 20 health-based violations on file for EUREKA - 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.