Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are a large group of human-made chemicals used to make common household nonstick, water repellent, and stain resistant products — like carpet, clothing, furniture fabric, food packaging and cookware.

PFAS contamination of drinking water usually occurs locally, near a facility where PFAS or products using them are manufactured, as well as around airfields where these chemicals are used to extinguish fires.

Tests conducted by the Iowa Department of Natural Resources revealed a combined concentration of fewer than 10 parts per trillion of PFAs, which is well below the current federal advisory levels. However, it was the first time DNR tests found the chemicals in notable concentrations in a major river. In the communities of Burlington, Davenport and Keokuk, this contaminated drinking water reaches more than 183,000 residents.

The EPA has established the combined PFAS health advisory level at 4 parts per trillion. Because this is only an advisory level, enforcement is not mandatory. Public water systems are not required to test for PFAS and many do not.

Public water systems are required to notify consumers if their water is known to be contaminated with PFAS. Consumers can also contact their local water supplier and ask for information on PFAS in their drinking water.

The Culligan® Reverse Osmosis Drinking Water System with a Total Defense Cartridge has been tested in laboratory and field applications by the Minnesota Department of Health and Water Quality Association and found to reduce PFAS in drinking water.

In addition, the Culligan® Whole Home System with dual carbon filters has been installed in over 300 homes and is proven to reduce PFAS in well water.