Polyfluoroalkyl Substances or PFAS

What are PFAS? (Pronounced pea-fass)

Polyfluoroalkyl substances—known as PFAS—are long-lasting chemicals whose components break down very slowly over time. Because of this, PFAS can build up in people, animals, and the environment. PFAS are sometimes called forever chemicals. They have been used in consumer products since the 1940s because of their useful properties.

Here are a few:

• Cosmetics
• Shampoo, conditioner, lotion, and soap
• Dishwasher detergent and laundry detergent
• Food packaging like microwave popcorn bags or pizza boxes
• Non-stick cookware (Teflon)
• Water-repellent fabrics for outdoor gear like tents or camping equipment

Should Greeley residents be concerned about PFAS?

The source water entering our two treatment plants comes from snowmelt, and our watershed is free of any known high-level concentration of PFAS coming from industrial sources. Greeley tested its source water for PFAS in 2024 and found no detectable levels of the 30 most common PFAS compounds. We continue to monitor through routine sampling even though Greeley’s chance of having a detection of PFAS is extremely low.

Greeley has also tested its drinking water for PFAS compounds through the EPA’s Unregulated Contaminant Monitoring Rule in both 2015 and again in 2023-2024. No detections of PFAS were measured in the treated drinking water coming from Greeley’s treatment plants in either of these sampling events.

The EPA finalized new federal standards to regulate PFAS in drinking water. What is Greeley Water’s response?

1. The City of Greeley’s first priority is the health of our community.
   1. Our certified water treatment operators, water quality staff and leadership place the highest priority on protecting the health and safety of people who live, work, and visit here.
2. The City of Greeley is closely monitoring all state and EPA regulations for drinking water, but we go above and beyond to ensure our water quality is the best it can be.
   1. We are actively tracking emerging scientific findings regarding PFAS in water including health concerns and treatment methods.
3. The City of Greeley conducts water quality tests that detect PFAS.
   1. Test results will be shared with the public in the Water Department’s annual Consumer Confidence Report, posted on the Water Quality webpage.
   2. We have sampled for PFAS in the past on our own and also participated in a voluntary study. PFAS has not been detected in the drinking water coming from our treatment plants.
4. What will the city do if it detects PFAS?
   1. Greeley will implement additional treatment methods that are approved and effective for PFAS removal.

How can people be exposed to PFAS?

Most people in the U.S. have been exposed to some PFAS due to their widespread production and use in consumer products. Most exposures are low, but some can be high if a person is around a concentrated source for a long time.

Here are some other ways:

• Working as a firefighter with foams that contain PFAS (AFFF) or around the manufacturing and processing of PFAS chemicals
• Eating certain foods that may contain PFAS, including fish
• Swallowing contaminated oil or dust
• Breathing air containing PFAS
• Using products made with PFAS or that are packaged in materials containing PFAS
• PFAS have been detected in rain

How can PFAS affect a person’s health?

• Decreased fertility or increased high blood pressure in pregnant women
• Developmental effects or delays in children
• Increased risk of some cancers
• Reduced ability of the body’s immune system to fight infections

What does EPA’s new finalized rule require public water utilities to do?

• EPA’s rule created “Maximum Contaminant Levels” (MCLs) for six PFAS in drinking water to prevent exposure to PFAS through public
water systems
• Monitor drinking water for PFAS
• Notify the public of any PFAS levels found in testing
• Reduce the levels of these PFAS in drinking water if they exceed the proposed standards

Where can I find more information about PFAS?

Go to www.epa.gov/pfas.