20211206 20483100 1.0 TRUE TRUE SFD2004017_CRMS The Carson River Mercury Site is a Superfund site on the National Priority List. The site includes mercury-contaminated soils and sediments from former mill sites involved in gold and silver mining in the late 1800s. Due to erosion over time, mercury contamination has spread from abandoned mill sites and tailings to some waterways and floodplains. Arsenic and lead, which were common constituents of the mined ore, have also been released into the environment as a byproduct of milling activities. This map includes boundaries and mill sites, soil/sediment samples, water samples, and faunal samples collected and analyzed throughout EPA and related institutional activity on the site from 1991 to 2020. CRMS Carson River Mercury Superfund Nevada NDEP NPL EPA SFD R9 Region 9 The Carson River Mercury Site (CRMS) is a Superfund site on the National Priority List contaminated by former mill sites involved in mining in the late 1800s. 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