History of PFAS in Woodbury

Per- and polyfluoroalkl substances (PFAS), a large family of many fluorinated compounds, are used by several companies around the world in household and industrial products such as stain repellents, lubricants, fire retardant and suppressants, and more. PFAS wastes from a manufacturing site in Cottage Grove, Minn., were disposed of at various locations in Washington County. The source of PFAS in Woodbury’s groundwater has been identified as these disposal sites. 

Below is a general timeline of PFAS-related activities in Woodbury since 2005, when the Minnesota Department of Health (MDH) began testing Woodbury wells for PFAS.

  1. 2005
  2. 2007
  3. 2009-2011
  4. 2012
  5. 2016
  6. 2017
  7. 2018
  8. 2019
  9. 2020
  10. 2021
  11. 2022
  12. 2023


MDH begins testing Woodbury’s wells for PFAS after low levels of PFAS were detected in private wells in western Lake Elmo. Monitoring of Woodbury groundwater production wells continues today.