Sulfate in California Well Water

In California, sulfate levels average 125.293 mg/L, with a maximum recorded level of 347.426 mg/L. The EPA limit is 250 mg/L. Currently 8.8% of tested wells exceed this limit, affecting approximately 105,600 wells.

Testing for sulfate in California typically costs around $109. If treatment is needed, water treatment systems for sulfate cost approximately $1,470.

The risk level for sulfate in California is rated as moderate. The state average of 125.293 mg/L is 12.4% above the national average of 111.500 mg/L.