Massachusetts PFAS Drinking Water Standard (MCL)

Information on MassDEP's efforts to establish a drinking water standard for Per- and Polyfluoroalkyl Substances (PFAS).

Massachusetts PFAS Standard for Public Drinking Water Supplies

On October 2, 2020, MassDEP published its public drinking water standard or Massachusetts Maximum Contaminant Level (MMCL) of 20 nanograms per liter (ng/L), or parts per trillion (ppt) for a group of six Per- and Polyfluoroalkyl Substances (PFAS).

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Massachusetts PFAS Standard for Public Drinking Water Supplies

On October 2, 2020, MassDEP published its PFAS public drinking water standard or Massachusetts Maximum Contaminant Level (MMCL) of 20 nanograms per liter (ng/L), or parts per trillion (ppt) applicable to community (COM) and non-transient non-community (NTNC) systems for the sum of the concentrations of six specific PFAS. The six PFAS are: perfluorooctane sulfonic acid (PFOS); perfluorooctanoic acid (PFOA); perfluorohexane sulfonic acid (PFHxS); perfluorononanoic acid (PFNA); perfluoroheptanoic acid (PFHpA); and perfluorodecanoic acid (PFDA). MassDEP abbreviates this set of six PFAS as “PFAS6.” This drinking water standard is set to be protective against adverse health effects for all people consuming the water. 

Additional information on the MassDEP public drinking water standard:

 

Information for PWS regarding Compliance with the MCL

Massachusetts PFAS Maximum Contaminant Level (MCL) Amendments & Public Comment

Massachusetts Stakeholders Meeting #2 - June 20, 2019

Massachusetts Stakeholders Meeting #1 - April 11, 2019

Massachusetts October 2018 Petition to Establish a Treatment Technique Drinking Water Standard

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