Is LAKE IN THE HILLS's water safe to drink?
LAKE IN THE HILLS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 28,661 people through 9,590 service connections.
Ranked against every other system in this dataset
LAKE IN THE HILLS has 15 violations on record in total, 4 of thems health-based - ranking it 4,266th of 12,903 systems by violation count, the 67th percentile nationally.
Against the IL average
IL's 560 covered systems average 5.0 health-based violations each; LAKE IN THE HILLS carries 4, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
LAKE IN THE HILLS's most recent violation on record is dated 2025-01-01, with the most recent health-based one dated 2012-01-08. Last reported to EPA: 05/27/2026.
The concern categories on record
LAKE IN THE HILLS'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)
- Radionuclides - flagged from: Combined Radium (-226 and -228)
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 LAKE IN THE HILLS's record does not cover
LAKE IN THE HILLS'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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 15 logged violations can see. The guide to what this data misses covers that gap.