Mercury in Montana Well Water

In Montana, mercury levels average 1.443 ppb, with a maximum recorded level of 4.68 ppb. The EPA limit is 2 ppb. Currently 12.0% of tested wells exceed this limit, affecting approximately 21,600 wells.

Testing for mercury in Montana typically costs around $145. If treatment is needed, water treatment systems for mercury cost approximately $4,105.

The risk level for mercury in Montana is rated as moderate. The state average of 1.443 ppb is 56.3% above the national average of 0.923 ppb.