WIDNR Required Drinking Water PFAS Sampling

New PFAS Monitoring Requirements in 2023

The Wisconsin Department of Natural Resources (WDNR) has added two different perfluoroalkyl substances (PFAS) to the Marinette Water Utility sampling monitoring schedule.

MCLs have been set for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) and are in effect as part of the revised NR 809, Safe Drinking Water, Wis. Adm. Code. PFOA and PFOS are two types of PFAS that are associated with numerous harmful health effects, including: higher cholesterol, reduced immune response, cancer, decreased infant birth weights. More information about the health effects of PFAS exposure can be found on the Department of Health Services website: https://www.dhs.wisconsin.gov/chemical/pfas.htm.

The MCL for PFOA and PFOS is 0.000070 mg/L (70 ppt). This level is set for the combined concentration of PFOA and PFOS. Systems that exceed the MCL for PFOA and PFOS will be required to take measures to return to compliance.

The Utility will collect a quarterly drinking water sample from the system entry point (EP 81). Listed are the detected contaminants from the finished water leaving the drinking water plant at the system entry point.

PFAS Sampling Results