Is ROCKDALE's water safe to drink?
ROCKDALE has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 2,012 people get their water from it, across 945 connections.
ROCKDALE's record against the rest of the country
ROCKDALE has 62 violations on record in total, 36 of thems health-based - ranking it 441th of 12,903 systems by violation count, the 97th percentile nationally.
How ROCKDALE compares within IL
IL's 560 covered systems average 5.0 health-based violations each; ROCKDALE carries 36, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for ROCKDALE is from 2025-01-10 (health-based: 2009-01-10). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
ROCKDALE'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:
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What this data is and is not
ROCKDALE's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and ROCKDALE's customers' taps is household plumbing, invisible to a system-level record ranked 441th of 12,903 by violation count. The guide to what this data misses covers that gap.