What's in BERKELEY's water?
BERKELEY has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 5,214, over 1,862 connections.
How this compares nationally
Out of 12,903 systems in this dataset, BERKELEY ranks 4,348th by violation burden (66th percentile) - 12 violations total, 4 health-baseds.
How BERKELEY compares within IL
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - BERKELEY's 4 is at or below 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 BERKELEY is from 2004-01-07 (health-based: 1994-01-07). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
BERKELEY'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
Everything on this page is BERKELEY's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and BERKELEY's customers' taps is household plumbing, invisible to a system-level record ranked 4,348th of 12,903 by violation count. The guide to what this data misses covers that gap.