Chloride in California Well Water

In California, chloride levels average 153.662 mg/L, with a maximum recorded level of 619.276 mg/L. The EPA limit is 250 mg/L. Currently 11.7% of tested wells exceed this limit, affecting approximately 140,400 wells.

Testing for chloride in California typically costs around $87. If treatment is needed, water treatment systems for chloride cost approximately $3,091.

The risk level for chloride in California is rated as moderate. The state average of 153.662 mg/L is 33.8% above the national average of 114.869 mg/L.