Water Update – July 17, 2025

July 17, 2025

5:30 p.m.

The Illinois Environmental Protection Agency (IEPA) sampled the water on Thursday, July 17. Results obtained today show the presence of an algal bloom neurological toxin at 0.058 parts per billion, a significant decrease from 0.215 parts per billion in yesterday’s test. Today’s results qualify as a non-detect reading.

Out an abundance of caution, the IEPA is recommending the City of Mattoon continues the DO NOT DRINK Order at this time. The next round of water testing is scheduled for Friday, July 18.

With the approval of the IEPA, the City of Mattoon began a controlled flush of the water system and will continue through tomorrow.

The City of Mattoon will continue to provide free water to residents at Lytle Park and Arland D. Williams Elementary School from 10:00 a.m. – 8:00 p.m. Residents may bring their own buckets or containers (maximum 5 gallons) for refill. All containers must have a secure lid.

We appreciate your continued patience, cooperation, and community spirit as we work to resolve this issue.

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