Copper in California Well Water

In California, copper levels average 1.024 mg/L, with a maximum recorded level of 2.299 mg/L. The EPA limit is 1.3 mg/L. Currently 9.9% of tested wells exceed this limit, affecting approximately 118,800 wells.

Testing for copper in California typically costs around $86. If treatment is needed, water treatment systems for copper cost approximately $4,551.

The risk level for copper in California is rated as moderate. The state average of 1.024 mg/L is 76.3% above the national average of 0.581 mg/L.