Copper in Washington Well Water

In Washington, copper levels average 0.709 mg/L, with a maximum recorded level of 3.147 mg/L. The EPA limit is 1.3 mg/L. Currently 1.8% of tested wells exceed this limit, affecting approximately 8,640 wells.

Testing for copper in Washington typically costs around $128. If treatment is needed, water treatment systems for copper cost approximately $2,091.

The risk level for copper in Washington is rated as minimal. The state average of 0.709 mg/L is 22.0% above the national average of 0.581 mg/L.