The Mixed Up, Muddled Up, Shook Up Path to PFAS Testing Standardization
The long-awaited fourth draft of US EPA Method 1633 was released in July 2023[i], as the product of a nearly 4-year collaboration between the U.S. Department of Defense (DoD) and the US EPA. A notice in the method provides that its use for Clean Water Act compliance . . .
Unregulated Contaminant Monitoring Rule (UCMR5)
In July 2023, the Environmental Protection Agency (US EPA) released the first set of data collected under the fifth Unregulated Contaminant Monitoring Rule (UCMR5). The list of contaminants being monitored in drinking water under UCMR5 include 29 per- and polyfluoroalkyl substances (PFAS) and lithium . . .