) Discuss the incidence of high drinking water arsenic levels in the U.S. and other areas of the world. (1) What levels are considered “high” and (2) what are the human health effects that are known to result from the use of drinking water with high arsenic concentrations? (3) How does arsenic get into drinking water? (4) Is exposure to high arsenic in drinking water a problem for municipal water supplies, or for well water?
