CDC and ATSDR are hosting two online information sessions to provide an update on the ongoing work across all eight exposure assessment sites.

El Paso County (CO) near Peterson Air Force Base

El Paso County near Peterson Air Force Base
Information Session

CDC and ATSDR scientists will host an online information session about PFAS exposure assessment, the participant recruitment process, and upcoming PFAS testing to be conducted with area residents.

August 4, 2020
6:00 p.m.–7:30 p.m.

How to Participate
Participants can join the virtual information session by phone or online using a computer, smartphone, or tablet. If possible, please join online to view the presentation.

To register for the online information session, go to external icon.

To join by phone, call the toll-free number 855-797-9485 and use access code: 161 414 3534

Live captioning will be available.

Please register in advance using the link above or by emailing Ana Pomales, Community Engagement Specialist, at: Participants may register up until the start of the information session.


Use and spills of aqueous film forming foam (AFFF) containing PFAS occurred at the Peterson Air Force Base primarily during firefighting training exercises. The PFAS traveled into the groundwater eventually affecting nearby water systems in El Paso County, CO.

Testing in 2013 and 2014 found PFAS in the Widefield WSD. PFAS were first detected in the Security WD and Security MHP in 2014 and 2016, respectively. These three drinking water systems had customers with sustained PFAS exposures greater than the current EPA health advisory. In 2016, all three systems took active measures to reduce PFAS exposure to customers. Based on information available to the ATSDR, drinking water supplies from all three systems currently meet federal PFAS guidelines.

In 2018, a health study, PFAS Assessment of Water and Resident Exposure (PFAS-AWARE), tested PFAS levels in approximately 200 people in El Paso County. Some were retested in 2019. Information can be found online at ATSDR’s exposure assessment is different from the earlier study. The exposure assessment will help public health professionals better understand the overall PFAS exposure in your community (not just for those who participate) and may provide information to help communities across the nation. The exposure assessment will also test children older than 3 years old; the PFAS-AWARE study was limited to adults. You can participate in the exposure assessment even if you participated in the PFAS-AWARE study.

Sampling Area 

CDC/ATSDR has identified a random selection of households exposed to PFAS in their drinking water above the Environmental Protection Agency’s (EPA’s) current health advisory level. This includes residents within the Security-Widefield area served by of households served by the drinking water systems of Security Water District (WD), Security Mobile Home Park (MHP), and the western portion of the Widefield Water and Sanitation District (WSD). Choosing a random selection of households to participate will help estimate exposure for all community members, even those not selected to participate.

All individuals living in selected households are eligible to participate if they:

  • Are 3 years of age or older (children will be included in the exposure assessment only if we have consent from a parent or legal guardian)
  • Do not have a bleeding disorder and are not anemic
  • Have lived in the sampling area for at least one year before November 10, 2016
The image shows the boundaries of the sampling frame in the Security-Widefield area


CDC and ATSDR will begin an exposure assessment in the Security-Widefield in August. Recruitment will continue for five weeks, then we will be in the area for sampling in mid-September. Individual results will be mailed to participants. This could take several months. We will also write a final report summarizing the findings and recommendations for your community and present the results at an information session.

Information session on 8/4/2020; recruitment begins on 8/4/2020; letters will be sent by 8/5/2020/sampling begins 9/15/2020

Page last reviewed: July 23, 2020