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Arsenic contamination of groundwater is a form of groundwater pollution which is often due to naturally occurring high concentrations of arsenic in deeper levels of groundwater. It is a high-profile problem due to the use of deep tube wells for water supply in the Ganges Delta, causing serious arsenic poisoning to large numbers of people. A ...
For example, median levels in Nevada were about 8 μg/L [15] but levels of naturally occurring arsenic as high as 1000 μg/L have been measured in the United States in drinking water. [16] Groundwater associated with volcanics in California contain As at concentrations ranging up to 48,000 μg/L, with As-bearing sulfide minerals as the main ...
Arsenic is found in clay strata due to their high surface area to volume ratio relative to sand-sized particles. Most pumped groundwater travels through sands and gravels with low arsenic concentration. However, during over-pumping, a high vertical gradient pulls water from less-permeable clays, thus promoting arsenic release into the water. [59]
A recent study by the Center for Environmental Health has revealed high levels of arsenic in two brands of bottled water sold by Whole Foods and Walmart.
KEYPORT — A slag-like material on the beach in Keyport contains high levels of arsenic and should be avoided, state environmental officials warned.
Common sources include fertilisers; [17] aging water supply infrastructure; [18] and microplastics floating in the world's oceans. [19] [20] Arsenic is thought to be used in connection with coloring dyes. [21] Rat poison used in grain and mash stores may be another source of the arsenic. [22] The geographical extent of sources may be very large.
According to the study, particularly high levels of arsenic were found in northwestern states, and high levels of cobalt were detected in honey from the Southeast.Arsenic was found in 89% of all ...
Under the LCR, if tests show that the level of lead in drinking water is in the area of 15 ppb or higher, it is advisable—especially if there are young children in the home—to replace old pipes, to filter water, or to use bottled water. EPA estimates that more than 40 million U.S. residents use water "that can contain lead in excess of 15 ppb".