PFAS Filters are Online at Mill Pond

8/2/2023

On July 20^th, the new PFAS filters at the Mill Pond treatment plant were placed online. After sending the water out for testing, the lab results have come back and show our PFAS levels at 0 parts per trillion. We thank you for your patience throughout the duration of this project.

Our Vinebrook Treatment Facility, which does not pump water into the Town’s water system for distribution, will continue to show levels above the state standards. This facility will remain offline until it is formally decommissioned.

The two methods of testing and lab results can be found here Version Options PFAS HeadlinePFAS Filters are Online at Mill PondExplanation of Quarterly Public Notice and here.

Explanation of Quarterly Public Notice

The quarterly public notice is required to be sent to residents within 30 days of a PFAS violation. The notice states, that based on our first two months of PFAS sampling and monitoring, even if the third month results were zero (0), our quarterly average would not be within in compliance of the 20 parts per trillion (ppt) maximum contaminant level (MCL).

Based on this, when the average of month one + month two + zero is greater than the MCL of 20 ppt, we are already placed in violation by MassDEP by the end of month two. The public notice pamphlet is then generated and sent prior to the results of month three being completed since the notice has to be sent within 30 days of violation.  

Please refer to the example tables below for reference.