Water testing in McHenry County, IL
Lowest listed local program price: $30, McHenry County Department of Health, Division of Environmental Health.
McHenry County Department of Health Private Well Water Test
$30
- Bacteria
- E. coli
- Nitrate
Pick up department sample bottles and a chain of custody form at the Division of Environmental Health, 667 Ware Road, Woodstock, or at a participating township office. Collect the sample the same day you drop it off. The Woodstock lab takes samples Monday to Thursday, 8:00 a.m. to 2:00 p.m.; township offices take them Wednesdays until noon. Results come the next business day. Call 815-334-4585.
Who can use it: McHenry County, Illinois private well owners
- Division of Environmental Health laboratory, 667 Ware Road, Woodstock · 815-334-4585
- Algonquin Township, 3702 Northwest Highway, Crystal Lake · 815-334-4585
- Grafton Township, 10109 Vine St, Huntley · 815-334-4585
- Marengo Township Offices, 4010 N IL Route 23, Marengo · 815-334-4585
- McHenry Township, 3703 N Richmond Road, Johnsburg · 815-334-4585
- Nunda Township Supervisor's Office, 3510 Bay Road, Crystal Lake · 815-334-4585
Checked October 2, 2026. Report a change