GENOA: EPA violation history, explained
GENOA has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 5,298 people through 2,060 service connections.
Ranked against every other system in this dataset
GENOA has 13 violations on record in total, 4 of thems health-based - ranking it 4,317th of 12,903 systems by violation count, the 67th percentile nationally.
Against the IL average
GENOA's 4 health-based violations sit within the IL average of 5.0, across 560 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
GENOA's most recent violation on record is dated 2025-01-07, with the most recent health-based one dated 1990-07-12. Last reported to EPA: 05/27/2026.
The concern categories on record
GENOA'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:
- Radionuclides - flagged from: Combined Radium (-226 and -228)
- Other regulated metals - flagged from: Barium
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What GENOA's record does not cover
Everything on this page is GENOA's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 13 logged violations can see. The guide to what this data misses covers that gap.