Samples from 230 wells in California were analyzed for dissolved selenium during 1975-85. Most of the sample wells are concentrated in eight areas of the State. Selenium was detected in all eight areas; however, only 6 of the 230 wells had concentrations greater than 10 micrograms per liter. Selenium was detected most frequently in wells of the Davis-Woodland area of the Sacramento Valley and in wells in Santa Barbara County. (USGS)
Additional Publication Details
USGS Numbered Series
Map of California showing distribution of selenium concentrations in wells sampled by the U. S. Geological Survey, 1975-85
1 map :photocopy ;108 x 100 cm., on sheet 116 x 107 cm.