We recommend these filters: 1.Big Berkey Gravity Water Filter - 2. Doulton Gravity Water Filter - 3. British Berkefeld. For more details check these filters in the search box below.

Mercury map USA

Modeled/predicted mercury deposition rates for the states (from Russ Bullock, NOAA/EPA).
Mercury in water sediment and fish.
Source USGS

Buy a water testing kit for mercury here.