Method 1623: Cryptosporidium and Giardia in Water by Filtration/IMS/FA

To support future regulation of protozoa in drinking water, the Safe Drinking Water Act Amendments of 1996 require the U.S. Environmental Protection Agency (EPA) to evaluate the risk to public health posed by drinking water contaminants, including waterborne parasites, such as Cryptosporidium and Giardia. To implement these requirements, EPA must assess Cryptosporidium and Giardia occurrence in raw surface waters used as source waters for drinking water treatment plants. EPA Method 1623 was developed to support this assessment.