District Headquarters

50 Elm St., Dedham, MA 02026

During Office Hours:

781-329-7090

After Hours Emergency:

781-326-1250

PFAS Regulatory Requirements

Massachusetts Department of Environmental Protection (MassDEP) PFAS Drinking Water Standard

In October 2020, MassDEP published its PFAS public drinking water standard or Massachusetts Maximum Contaminant Level (MMCL) of 20 parts per trillion (ppt).

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.

 

Image of a swimming pool (Right) How Much is One Part Per Trillion?  - 1 second in 32,000 years - 1 ft² in the State of Maine - 1 drop in 20 Olympic-size swimming pools - $1.20 out of all US currency in circulation - 1 inch in 643 trips around Massachusthe earth.
Graphic sourced from the Massachusetts Water Works Association.