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Community Water Systems
MDH health-based guidance levels for PFOS and PFOA
Today, the Minnesota Department of Health (MDH) released revised health-based guidance values (HBVs) for two per- and polyfluoroalkyl substances (PFAS) in drinking water, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). These values are lower than Minnesota’s previous HBVs for those chemicals.
MDH is evaluating how to incorporate the updated PFOS and PFOA guidance values into our risk assessment for PFAS in drinking water. We will keep systems informed and work with systems if action needs to be taken to meet lower drinking water values for PFAS. MDH has been a leader in PFAS science and will continue to follow evolving science in developing future guidance and recommendations.
Attached are additional resources to help systems prepare for potential questions. For more resources and information about risk communication, see the Drinking Water Risk Communication Toolkit.
Please contact your district engineer with any questions.
For more information
Additional information is available on our website at Per- and Polyfluoroalkyl Substances (PFAS) and at PFAS and Health.
People can learn more about actions they can take to reduce their exposure to PFAS at Reducing Exposures: Per- and Polyfluoroalkyl substances (PFAS) (PDF).
The MDH website also includes an interactive dashboard that shows the status and results of PFAS testing in Minnesota drinking water systems. MDH will update the dashboard as needed after we have determined how the updated guidance values for PFOS and PFOA will be used for evaluating PFAS in public water systems.
As always, thank you for your partnership and all that you do!
PFAS in Drinking Water FAQs (PDF)
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