MARENGO: EPA violation history, explained
MARENGO has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 7,572 people through 2,810 service connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, MARENGO ranks 8,468th by violation burden (34th percentile) - 7 violations total, 1 health-based.
How MARENGO compares within IL
IL's 560 covered systems average 5.0 health-based violations each; MARENGO carries 1, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for MARENGO is from 2009-01-10 (health-based: 1992-01-11). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
MARENGO'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)
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 MARENGO 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. Between the utility's meter and MARENGO's customers' taps is household plumbing, invisible to a system-level record ranked 8,468th of 12,903 by violation count. The guide to what this data misses covers that gap.