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Massachusetts Water Resources Authority


Posted February 25, 2016


Ria Convery
(617) 788-1105,

Town of Winchester Will Temporarily Use of MWRA Water
March 1 - May 15, 2016

The Town of Winchester’s middle-low system will be switching over to Massachusetts Water Resource Authority (MWRA) water supply during a reservoir construction project from March 2 through May 15, 2016.

The chemistry of the water supplied by the MWRA differs from that supplied by the Town of Winchester. The two main differences are:

MWRA uses chloramines – a mild and long-lasting disinfectant combining chlorine and ammonia (Winchester uses free chlorine).

MWRA water has a higher pH – around 9 to 9.5. 

For more information, please read the Town of Winchester Water and Sewer Department Notice.

If you have any questions, please call the MWRA:

Joshua Das, 617-788-4822
Stephen Estes-Smargiassi, 617-788-4303

More information

Question and Answers about Chloramines (PDF)

Questions and Answers about Rusty and Yellowish Water (PDF)

How the MWRA Water System Works

MWRA Annual Water Quality Test Results

MWRA Monthly Water Quality Test Results



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Updated March 28, 2016