What's in ISU's water?
ISU has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 42,000 people through 103 service connections.
Ranked against every other system in this dataset
12 total violations and 4 health-based ones put ISU at the 66th percentile nationally for violation burden, rank 4,325 of 12,903.
Against the IA average
Among the 203 IA systems in this dataset, the average is 3.5 health-based violations - ISU's 4 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
ISU's most recent violation on record is dated 2022-01-10, with the most recent health-based one dated 2005-01-07. Last reported to EPA: 06/17/2026.
The concern categories on record
ISU'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 ISU's record does not cover
This is what ISU 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 - 4 health-based violations on file for ISU - 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.