What's in DARIEN's water?

DARIEN's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 21,751 people get their water from it, across 8,944 connections.

Ranked against every other system in this dataset

3 total violations and 0 health-based ones put DARIEN at the 10th percentile nationally for violation burden, rank 11,590 of 12,903.

How DARIEN compares within IL

IL's 560 covered systems average 5.0 health-based violations each; DARIEN carries 0, not more than typical for the state. The filter guide explains what a violation like this actually calls for.

Most recent violation on record

The last violation EPA has on record for DARIEN is from 2024-01-07. Last reported to EPA: 05/27/2026.

What this data is and is not

Everything on this page is DARIEN's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 3 logged violations can see. The guide to what this data misses covers that gap.