Are the arsenic levels exceeding EPA’s new arsenic standards of 10 ppb?
Normally there are two standards – a drinking water standard for water that is distributed for drinking and a water quality standard for the river. Regarding the drinking water standard, EPA has decided that the drinking water standard for arsenic should be revised from 50 parts per billion (ppb) to 10 ppb. The compliance date for the revised standard is January 2006. In the meantime, the applicable standard is 50 ppb for those that supply drinking water.
