PFAS - Links and Resources

PFAS READINGS in Parts Per Trillion (PPT)

The table above shows the results of Hopkinton's PFAS6 testing of its water supply as compared to the MassDEP's Maximum Contaminant Level (MCL) of 20 ng/L. Some people who drink water containing PFAS6 in excess of the MCL of 20 ng/L may experience certain adverse effects. These could include effects on the liver, blood, immune system, thyroid, and fetal development. These PFAS6 may also elevate the risk of certain cancers. For more information on PFAS, see the links below.

What should I do?

For Consumers in a sensitive subgroup (pregnant or nursing women, infants less than one-year-old, and people diagnosed by their health care provider to have a compromised immune system)

     • Consumers in a sensitive subgroup are advised not to consume, drink, or cook with water when the level of PFAS6 is above 20 ng/L.
     • Consumers in sensitive subgroups are advised to use bottled water for drinking and cooking of foods that absorb water (like pasta).
     • For infant formula, use bottled water or use formula that does not require adding water.
     • Bottled water should only be used if it has been tested. The Massachusetts Department of Public Health requires companies licensed to sell or distribute bottled water or carbonated non-alcoholic beverages?to test for PFAS.? See?

For all other consumers not in a sensitive subgroup

     • If you are not in a sensitive subgroup, you may continue to consume the water because the 20 ng/L value is applicable to a lifetime consuming the water and shorter duration exposures present less risk.
     • If you have specific health concerns regarding your past exposure, you should see the Centers for Disease Control and Prevention’s link below and consult a health professional, such as your doctor.

Steps you can take to reduce your intake - Consider taking the following steps while actions are being implemented to address this issue:
     • For older children and adults (not in a sensitive subgroup), the 20 ng/L value is applicable to a lifetime of consuming the water. For these groups, shorter duration exposures present less risk. However, if you are concerned about your exposure while steps are being taken to assess and lower the PFAS6 concentration in the drinking water, use of bottled water will reduce your exposure.
     • Home water treatment systems that are certified to remove PFAS by an independent testing group such as NSF, UL, or the Water Quality Association may be effective in treating the water. These may include point of entry systems, which treat all the water entering a home, or point of use devices, which treat water where it is used, such as at a faucet. For information on selecting home treatment devices that are effective in treating the water for PFAS6 see MassDEP factsheet and weblinks below.
     • In most situations, the water can be safely used for washing foods, brushing teeth, bathing, and showering.
Please note: Boiling the water will not destroy PFAS6 and will somewhat increase its level due to the evaporation of some of the water.
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PFAS - Links and Resources23 documents

  • Public Notice - April 2024
    document date 04-08-2024
  • Public Notice - September 2023
    document date 09-28-2023
  • Public Notice - July 2023
    document date 07-13-2023
  • Public Notice - April 2023
    document date 05-04-2023
  • Public Notice - January 2023
    document date 03-07-2023
  • Public Notice October 2022
    document date none
  • Public Notice - August 2022
    document date none
  • Public Notice - Hopkinton Water Has PFAS6 Levels Above the Drinking Water Standard
    document date none
  • Press Release - 9/24/2021
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  • Press Release - 12/8/2021 (PDF)  12/8/21 (Google Docs version)
    document date none
  • PFAS Public Informational Meeting - Recording From 10/26/21
    document date none
    HCAM YouTube
  • FAQ - Excerpted questions and answers from PFAS Public Educational Meeting
    document date none
  • Drinking Water PFAS Public Education Mailing
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  • Safe Water Massachusetts
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  • USEPA PFAS Resources
    document date none
  • MassDEP PFAS Resources for Public Water Supplies
    document date none
  • MassDEP PFAS Regulatory Process
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  • MassDEP List of Bottlers and Bottled Water PFAS Results
    document date none
  • MassDEP Certified Labs
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    document date none
  • Agency for Toxic Substances and Disease Registry (ATSDR) Guide for Clinicians
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  • American Water Works Association PFAS Cycle
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  • Where can residents with private wells get more information about PFAS in their water?
    document date none