Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water Act; National Primary Drinking Water Regulations; and National Secondary Drinking Water Regulations; Methods Update

EPA is approving the use of updated versions of test procedures (i.e., analytical methods) for the determination of chemical, radiological, and microbiological pollutants and contaminants in wastewater and drinking water. These updated versions of analytical methods have been published by one or more of the following organizations: American Society for Testing Materials (ASTM), United States Geological Survey (USGS), United States Department of Energy (DOE), American Public Health Association (APHA), American Water Works Association (AWWA), and Water Environment Federation (WEF). Previously approved versions of the methods remain approved. Today's action will give the analytical community a larger selection of analytical methods. Today's action also corrects typographical errors and updates references where appropriate.