A group of compounds of emerging concern are per- and polyfluoroalkyl substances, known collectively as PFAS.

PFAS are used in a variety of everyday products to increase resistance to water, grease, or stains. PFAS can be found in products including carpet, clothing, fabric for furniture, paper packaging for food, cookware, and other materials. They are also used industrial processes and in in aqueous firefighting foams (AFFF) used at airfields and other high temperature fires.

The Environmental Protection Agency has not set regulatory standards for these chemicals while research continues to be conducted. The EPA did set a Health Advisory Level of 70 parts per trillion for the combined amount of two more common PFAS compounds in drinking water, PFOS and PFOA. OWASA began proactive quarterly testing of raw water samples as well as treated drinking water samples in 2018 to monitor these compound levels and begin evaluating the effectiveness of OWASA’s treatment methods.

PFAS Monitoring Program

Below you can see additional information regarding OWASA’s ongoing, proactive PFAS monitoring program.

OWASA Overview

Testing shows that levels of PFAS in OWASA treated drinking water being delivered to customers are well below the EPA’s current Health Advisory Level. You can see additional data and relevant information in the dashboard below.