It has been estimated in a national arsenic occurrence survey of drinking water supplies that as many as 35 to 40% of U.S. public water systems have arsenic above the maximum contaminant level (MCL) of 10 parts per billion (ppb), and have co-occurrence of iron above the secondary MCL of 0.3 mg/L. This presents an interesting challenge for small systems, which may or may not have any treatment in place for either iron or arsenic to meet their respective MCLs.
Technology considerations for effective co-contaminant treatment
Determining and applying POE & POU for arsenic removal
Community systems achieve arsenic removal well below new standard
Accurate analysis helps determine appropriate treatment
Safe landfill disposal of spent arsenic removal media
A closer look at coprecipitation, adsorption and ion exchange
Less than three months after the January 2006 deadline for public water systems to make operational changes to comply with the 10 ppb MCL for arsenic, the U.S. EPA is proposing a revision. The revision would allow systems serving 10,000 or fewer residents to have as much as 30 ppb of arsenic, three times the level of contaminants allowed under the new regulations.
The proposed revision is a direct response to complaints by small communities that cannot afford to comply with the new limit.
POE arsenic removal program provides testing, support and residuals removal in addition to treatment system