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Toxic trace element contamination
Introduction into the environment of elements (such as arsenic, cadmium, lead, and mercury) which have a deleterious effect on living organisms when found naturally in only minor amounts (concentrations less than 1.0 milligram per liter) in water or sediment.
Subtopics:
Mercury contamination (17 items)
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Results 11 - 20 of 40 listed alphabetically [list by similarity]
Groundwater quality in Coachella Valley, California [More info]
Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Vanadium was present at moderate concentrations.
Groundwater quality in the Antelope Valley, California [More info]
Trace elements were present at high concentrations in 32% of the primary aquifers here, and at moderate concentrations in 17%. Of particular interest are aluminum, arsenic, vanadium, boron, fluoride, chromium, lead, and molybdenum.
Groundwater quality in the Central Sierra Nevada, California [More info]
Recent study indicates that inorganic trace elements and radioactive constituents are more likely to be subjects of concern in this less-developed area than anthropogenic organic compounds.
Groundwater quality in the Colorado River basins, California [More info]
Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Chromium was detected at moderate concentrations.
Groundwater quality in the Indian Wells Valley, California [More info]
Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, molybdenum, strontium, and vanadium. Chromium and fluoride were detected at moderate concentrations.
Groundwater quality in the Madera and Chowchilla subbasins of the San Joaquin Valley, California [More info]
Uranium, arsenic, and nitrate were the inorganic constituents that were most frequently detected at high concentrations, mostly in shallower wells. High and moderate concentrations of arsenic were detected in deeper wells.
Groundwater quality in the Middle Sacramento Valley, California [More info]
Results of a survey of contaminants in untreated groundwater in this area. Arsenic and boron were the two trace elements detected most frequently at concentrations greater than the benchmarks.
Groundwater quality in the Mojave area, California [More info]
Six elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, strontium, and vanadium. Lead was present at moderate concentrations.
Groundwater quality in the Northern San Joaquin Valley, California [More info]
Arsenic and boron were the trace elements that most frequently occurred at high concentrations. Fumigants (pesticides) were detected at high concentrations in 3% of the primary aquifers. Herbicides and insecticides were detected at low concentrations.
Groundwater quality in the Owens Valley, California [More info]
Trace elements boron, arsenic, and molybdenum were found at high concentrations in 15% of primary aquifers in this area.
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