Is MARENGO WATER SUPPLY's water safe to drink?
MARENGO WATER SUPPLY has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 2,435 people get their water from it, across 1,020 connections.
How this compares nationally
MARENGO WATER SUPPLY has 21 violations on record in total, 2 of thems health-based - ranking it 6,211th of 12,903 systems by violation count, the 52th percentile nationally.
Against the IA average
MARENGO WATER SUPPLY's 2 health-based violations sit within the IA average of 3.5, across 203 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
MARENGO WATER SUPPLY's most recent violation on record is dated 2019-01-08, with the most recent health-based one dated 2006-01-10. Last reported to EPA: 06/17/2026.
The concern categories on record
MARENGO WATER SUPPLY'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 MARENGO WATER SUPPLY's record does not cover
This is what MARENGO WATER SUPPLY 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 MARENGO WATER SUPPLY - 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.