Fluoride in Illinois Well Water

In Illinois, fluoride levels average 1.749 mg/L, with a maximum recorded level of 6.309 mg/L. The EPA limit is 4 mg/L. Currently 10.5% of tested wells exceed this limit, affecting approximately 47,250 wells.

Testing for fluoride in Illinois typically costs around $94. If treatment is needed, water treatment systems for fluoride cost approximately $3,070.

The risk level for fluoride in Illinois is rated as moderate. The state average of 1.749 mg/L is 1.2% below the national average of 1.771 mg/L.