Water testing in St. Clair County, IL

Lowest listed local program price: Free, St. Clair County Health Department.

Well water

St. Clair County Health Department Free Private Well Water Testing

Free

Bacteria

Pick up a water sample bottle at the St. Clair County Health Department, 19 Public Square, Suite 150, Belleville, and have staff collect the sample on a Monday, Tuesday, or Wednesday; the state lab tests it for bacteria at no charge.

Official page

Who can use it: Residents of St. Clair County, Illinois who get drinking water from a private well rather than a municipal water supply

St. Clair County Health Department, 19 Public Square, Suite 150, Belleville · 618-233-7769

Checked October 2, 2026. Report a change

See statewide tests and certified-lab lists for Illinois.

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