What's in ARLINGTON HEIGHTS's water?
ARLINGTON HEIGHTS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 73,320, over 20,539 connections.
How this compares nationally
29 total violations and 1 health-based ones put ARLINGTON HEIGHTS at the 41th percentile nationally for violation burden, rank 7,669 of 12,903.
How ARLINGTON HEIGHTS compares within IL
ARLINGTON HEIGHTS's 1 health-based violations sit within the IL average of 5.0, across 560 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for ARLINGTON HEIGHTS is from 2027-02-01 (health-based: 1986-01-01). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
ARLINGTON HEIGHTS'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)
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
ARLINGTON HEIGHTS'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. This record - 1 health-based violation on file for ARLINGTON HEIGHTS - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.