Mercury in Washington Well Water

In Washington, mercury levels average 0.312 ppb, with a maximum recorded level of 0.809 ppb. The EPA limit is 2 ppb. Currently 5.8% of tested wells exceed this limit, affecting approximately 27,840 wells.

Testing for mercury in Washington typically costs around $75. If treatment is needed, water treatment systems for mercury cost approximately $3,281.

The risk level for mercury in Washington is rated as low. The state average of 0.312 ppb is 66.2% below the national average of 0.923 ppb.