How is arsenic measured?
A laboratory test for heavy metals measures arsenic in well water. The laboratory equipment is capable of measuring arsenic at extremely low levels or in parts per billion (ppb). The measurement of one part per billion of arsenic in groundwater is equivalent to one minute in 2,000 years. What is the drinking water standard for arsenic? A drinking water standard, or maximum contaminant level (MCL), is the maximum level of a contaminant that is allowed in drinking water. This level is based on protection of human health, but also considers feasible treatment technologies and monitoring capabilities. A value above the MCL does not indicate that harmful effects will occur, but that a risk exists that should be evaluated. The drinking water standard or MCL for arsenic is 10 parts per billion (ppb). How can arsenic affect my health? Drinking water that contains too much arsenic over a long period of time can cause nerve and blood vessel damage and skin changes. The most typical symptoms incl
