Water Hardness in Washington Well Water

In Washington, water hardness levels average 169.64 mg/L CaCO3, with a maximum recorded level of 375.69 mg/L CaCO3. The EPA limit is 180 mg/L CaCO3. Currently 4.5% of tested wells exceed this limit, affecting approximately 21,600 wells.

Testing for water hardness in Washington typically costs around $26. If treatment is needed, water treatment systems for water hardness cost approximately $1,791.

The risk level for water hardness in Washington is rated as low. The state average of 169.64 mg/L CaCO3 is 22.7% above the national average of 138.229 mg/L CaCO3.