What's in POSEN's water?
POSEN has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 5,331, over 1,754 connections.
POSEN's record against the rest of the country
25 total violations and 3 health-based ones put POSEN at the 61th percentile nationally for violation burden, rank 4,979 of 12,903.
How POSEN compares within IL
POSEN's 3 health-based violations sit within the IL average of 5.0, across 560 systems statewide. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for POSEN is from 2025-02-07 (health-based: 2013-01-06). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
POSEN'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
This is what POSEN 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 25 logged violations can see. The guide to what this data misses covers that gap.