Arsenic (As) is a naturally occurring semi-metal that has no taste, odor, or color. It is commonly found in rocks, soil, and groundwater. Arsenic can also enter water supplies through mining operations, industrial runoff, and agricultural pesticides or fertilizers.
Although arsenic does not dissolve easily in water, it can still leach into wells and municipal supplies. It is highly toxic and classified by the U.S. EPA as a known carcinogen. Because it is invisible, tasteless, and odorless, many homeowners are unaware of its presence until testing is done.In 2001, the EPA lowered the maximum allowable level of arsenic in drinking water from 50 ppb to 10 ppb — the current standard. Even at low levels, long-term exposure to arsenic is linked to serious health risks, making effective removal essential for families on well water or in areas with known contamination.
