Arsenic in Drinking Water
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Compliance Options: Treatment Technology Descriptions
In accordance with the Arsenic Rule, systems must demonstrate compliance with the revised arsenic maximum contaminant level (MCL) (10 ppb) at each entry point to the distribution system. Systems utilizing multiple sources will need to consider a mitigation strategy for each entry point to the distribution system that exceeds the revised MCL.
A system will need to optimize existing treatment or install new treatment if it has high arsenic sources and cannot achieve compliance through a non treatment options such as blending, seasonal use of sources, or development of an alternative source. The system should first determine whether any of its existing treatment technology is capable of removing arsenic even though it may not be doing so currently.
Treatment may be accomplished at the wellhead, as a centralized treatment system (water pumped from several sources to a centralized location for treatment before entering the distribution system). Also, treatment located at the Point-of-Use (POU) or Point-of-Entry (POE) within a building or entering a building, respectively, may be appropriate in some situations.
Click on a link below to find information on each compliance option. These descriptions provide a first-look introduction to arsenic treatment technologies. For additional information, including technical design manuals, click on the links at the end of each section.