McHenry County Department of Health - Environmental Health
Effective January 1, 2026: Payments to the Division of Environmental Health must be submitted via card or check. Cash will no longer be accepted.

Private Water Supply

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McHenry County is 100% dependent upon groundwater for its source of drinking water. Groundwater is found in geological formations called aquifers.  Groundwater for domestic use is generally bacteriologically safe in its natural state.

Contact the MCDH's Division of Environmental Health more information if your well is in a pit or the well head is buried: (815) 334-4585.

Applications List of Licensed Water Well Driller Contractors Fee Schedule

 

Private Well Water Maintenance
Water Testing
Private Water Wells Explained
The Do's and Don'ts of Using Your Water Well System