Is DUQUOIN's water safe to drink?
DUQUOIN has at least one health-based violation EPA's ECHO database still lists as unaddressed - the required fix has not been reported complete. Population served: 7,169, over 3,039 connections.
DUQUOIN's record against the rest of the country
DUQUOIN has 18 violations on record in total, 6 of thems health-based - ranking it 3,131th of 12,903 systems by violation count, the 76th percentile nationally.
How DUQUOIN compares within IL
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - DUQUOIN's 6 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for DUQUOIN is from 2026-10-08 (health-based: 2025-05-10). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
DUQUOIN'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 REVISIONS
- 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 DUQUOIN 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 DUQUOIN's customers' taps is household plumbing, invisible to a system-level record ranked 3,131th of 12,903 by violation count. The guide to what this data misses covers that gap.