All of the tornado sirens for St. Clair County’s new, countywide warning system for dangerous weather have now been installed.

It’s a project that took more than two years to complete.

The St. Clair County Board voted to sign a $2.49 million contract with Acoustic Technology, Inc. Systems at its Oct. 24, 2022, meeting.

The company planned to replace 79 existing sirens across the county and install 43 new ones to provide outdoor warning coverage to every community, unless officials opted out. The project was paid for with federal COVID-related relief funds from the American Rescue Plan.

Installations began in March 2023 in Sugarloaf Township, which didn’t previously have sirens.

ATI Systems was in St. Clair County the last week of May 2025 finalizing the work, according to Count

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