What's in MARION's water?
MARION has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 16,855 people get their water from it, across 9,812 connections.
How this compares nationally
Out of 12,903 systems in this dataset, MARION ranks 3,476th by violation burden (73th percentile) - 39 violations total, 5 health-baseds.
Against the IL average
IL's 560 covered systems average 5.0 health-based violations each; MARION carries 5, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
MARION's most recent violation on record is dated 2013-01-08, with the most recent health-based one dated 2002-01-06. Last reported to EPA: 05/27/2026.
The concern categories on record
MARION'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); Interim Enhanced Surface Water Treatment Rule
- Disinfection byproducts - flagged from: TTHM
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 MARION's record does not cover
This is what MARION 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 39 logged violations can see. The guide to what this data misses covers that gap.