Understanding PFAS, PFOA, and PFOS

What are PFAS?

PFAS (per- and polyfluoroalkyl substances) are a series of man-made chemical compounds that persist in the environment for long periods of time. They are often called “forever chemicals”. For decades, PFAS chemicals have been used in industry and consumer products such as nonstick cookware, waterproof clothing, and stain resistant furniture. The latest science shows that these chemicals are harmful to our health.

What has the District done to combat PFAS?

Delivering a high-quality and reliable water supply is the District’s paramount mission. The District utilizes granular activated carbon (GAC) treatment across all active wells to remove PFOS and PFOA from the drinking water. GAC is recognized as the best available technology for PFOS and PFOA treatment and the District is committed to staying ahead of evolving regulations to ensure that the water you consume meets all local and federal standards.

Sampling & Compliance

Our commitment to your water quality goes beyond filtration and treatment. To ensure our systems are operating as required, we conduct monthly sampling at all our water production sites. This frequent testing allows us to monitor water quality in real time and ensures that our treatment systems are effectively removing contaminants before they reach your tap.

Meeting National Standards

Maximum contaminant levels (MCLs) have been established by the Environmental Protection Agency (EPA) for both PFOS and PFOA at 4.0 parts per trillion (ppt). With the District investing in both our Schroeter Avenue and Theodora Street water treatment plants, we are investing in the best available technology to meet these stringent regulations and protect our community’s health for generations to come.

Water you can Trust

Because of the use of GAC filtration, when water leaves the District’s treatment plants, the levels of PFOS and PFOA are routinely below detectable levels, exceeding the EPA’s proposed 4.0 ppt maximum contaminant levels.