GW Intro

PFAS Sites Being Investigated

  • Known PFAS Sites

    Visit the Michigan PFAS Sites and Areas of Interest Mapper

    PFAS sites are where one or more groundwater sample exceeds the Part 201 cleanup criteria for groundwater used as drinking water, which is 70 ppt PFOS + PFOA.  New site summaries are routed through MPART so that all agencies are aware of the site and can contribute to the investigation as needed.  Sites are added to the map at the right after being vetted through MPART. 

    In 2018, the MDEQ's Remediation
    and Redevelopment Division (RRD)
    established cleanup criteria for
    groundwater used as drinking water
    of 70 ppt of perfluorooctanoic acid
    (PFOA) and perfluorooctanesulfonic
    acid (PFOS), individually or
    combined. The RRD staff are
    responsible for implementing these
    criteria as part of their ongoing efforts
    to clean-up sites of environmental












    Site investigations get started for a variety of reasons.  At some sites, like Superfund sites, DEQ staff have been overseeing environmental cleanup efforts for many years, and may add PFAS sampling to ongoing sampling if PFAS was known or suspected to have been used at the site.  DEQ staff also conduct routine monitoring of rivers and lakes, and if a sample exceeds water quality standards, staff work upstream until they find the site contributing to the PFAS. Other sites were sampled due to historical information, such as Carl’s Retreading, which was where tires burned for many days and firefighting foam containing PFAS was used.  DEQ is committed to continuing to do all of these types of sampling efforts.

  • History of this PFAS SITES BEING INVESTIGATED webpage PDF icon

Confirmed PFAS Sites

Local Site Information

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