Sulfate in Washington Well Water

In Washington, sulfate levels average 81.329 mg/L, with a maximum recorded level of 314.189 mg/L. The EPA limit is 250 mg/L. Currently 8.5% of tested wells exceed this limit, affecting approximately 40,800 wells.

Testing for sulfate in Washington typically costs around $89. If treatment is needed, water treatment systems for sulfate cost approximately $3,888.

The risk level for sulfate in Washington is rated as moderate. The state average of 81.329 mg/L is 27.1% below the national average of 111.500 mg/L.