This map shows the general pattern of arsenic contamination from the Asarco Tacoma Smelter. You can also view information about other areas of arsenic contamination statewide, by searching an address or viewing that area on the map:
The Tacoma Smelter Plume map (purple, red, orange, yellow) is based on a mathematical model. The calculations are based on a relatively small number of samples, given the large area that is affected.
The map shows an estimate of the highest arsenic levels likely to be found in an area. However, a property may have lower (or higher) amount of arsenic. Property-specific sampling is necessary to determine the actual amount of arsenic on a given property.
|Element||Sample Result (Low)||Sample Result (Moderate)||Sample Result (Moderate)||Sample Result (High)|
|Arsenic||Under 20 ppm||20-40 ppm||40-100 ppm||Over 100 ppm|
|Lead||Under 50 ppm||50-250 ppm||250-500 ppm||Over 500 ppm|