PFAS in Groundwater

Of Woodbury’s 19 municipal wells, water from nine wells–based on the most current data–have detectable levels of per- and polyfluoroalkyl substances (PFAS) that on repeatable occasion exceed one or more thresholds established by the Minnesota Department of Health (MDH). All nine of these wells were removed from service upon receipt of a health advisory. Four wells were returned to service in June 2020 with treatment at the temporary water treatment plant in order to maintain supply levels. Two additional wells were returned to service with treatment in June 2022 with the expansion of the temporary treatment plant.

Woodbury’s drinking water continues to meet state standards and guidelines for PFAS.

Woodbury is working with state agencies to construct a permanent water treatment plant to remove PFAS from the city’s water supply. The letter below provides a reference to work accomplished and the need to address critical elements of the project to keep moving forward. The city continues to advocate for its residents and businesses in building the facility as quickly as possible while maximizing funds from the state’s 2018 3M settlement.

Letter from Woodbury Mayor Anne Burt to Minnesota Pollution Control Agency and Minnesota Department of Natural Resources – Aug. 5, 2022

Per- and polyfluoroalkl substances (PFAS) were made and used by several companies around the world in household and industrial products such as stain repellents, lubricants, fire retardant and suppressants, and more. The 3M Company made PFAS at its Cottage Grove facility from the late 1940s until 2002.

PFAS wastes were disposed of at several sites in Washington County including locations in Lake Elmo, Oakdale and in southern Woodbury near Woodbury Drive (3M Woodbury site). The source of the PFAS in our groundwater has been identified as these disposal sites and the manufacturing facility in Cottage Grove.

Funding for the Woodbury temporary water treatment plant is provided through the 2018 settlement agreement between the State of Minnesota and 3M. This arrangement includes a $40 million provision for temporary facilities meeting the requirements of the 2007 settlement agreement between the same two parties.

Visit the Minnesota Department of Health's website for more information.

If you have questions about the city's water system and the impact of PFAS, contact the Public Works Department.

  1. Conceptual Drinking Water Plan

The final Conceptual Drinking Water Supply Plan (CDWSP), released by the Minnesota Pollution Control Agency (MPCA) and Minnesota Department of Natural Resources (DNR) in August 2021, provides safe, sustainable drinking water to the 14 East Metro communities affected by PFAS now and into the future. Each of the 14 communities received a tailored project list based on their needs, community feedback and cost estimates.

Review the plan

For questions about the plan, send an email to the state.

  1. Remediation Activities
  1. Temporary & Permanent Treatment
  1. Private Wells
  1. Environmental Protection Agency Guidelines Update
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