HIGHLAND: EPA violation history, explained
HIGHLAND has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 10,674 people get their water from it, across 4,990 connections.
Ranked against every other system in this dataset
18 total violations and 6 health-based ones put HIGHLAND at the 76th percentile nationally for violation burden, rank 3,129 of 12,903.
How HIGHLAND compares within IL
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - HIGHLAND'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 HIGHLAND is from 2026-01-01 (health-based: 2010-01-01). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
HIGHLAND'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:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
- Synthetic organic chemicals / pesticides / VOCs - flagged from: Atrazine
- Disinfection byproducts - flagged from: Total Haloacetic Acids (HAA5)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
This is what HIGHLAND 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 18 logged violations can see. The guide to what this data misses covers that gap.