Drinking Water Quality

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Annual Water Report - 2021

CSO and SSO Notfications

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CSO and SSO Notifications

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Climate Change
Environmental Justice
Renewable Energy
CSO Control

Aqueduct Trails

Natick Trail

About the Aqueduct Trails
What Not to Flush
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It's a toilet, not a trash can!

Massachusetts Water Resources Authority
Charlestown Navy Yard, 100 First Avenue
Boston, Massachusetts 02129
(617) 242-6000


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Wastewater COVID-19 Tracking

Updated: January 28, 2023

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PFAS Testing in MWRA Drinking Water

Updated June 2022

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We're Hiring!

MWRA has a number of job openings. Be part of a team that works to protect public health and the environment.

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Temporary Fluoride Shutdown

As part of a project to replace portions of the fluoride feed piping and equipment at the Carroll Water Treatment Plant serving MetroWest and metro Boston communities, MWRA will need to shut down the fluoride feed for a few months starting in early March. While fluoridation is important for dental health, health officials indicate that this short-term shutdown does not require any special additional action by consumers.

More details and scheduling will be posted here.

Important Notice


No updates at this time.

MWRA 24-Hour
Emergency Contacts
Water: 617-305-5950
Sewer: 617-305-5940
Security: 877-697-6972
TTY: 617-371-1903
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Want to know how your water quality is? Looking for updates on the MWRA construction project in your neighborhood? What if there is a water emergency in your area? MWRA can keep you informed when you're at home, at work or on the road. Take a few minutes to sign up and get notifications on your phone, by email, or text message.

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Comment Period Open on MWRA’s Final CSO Notification Plan

January 27, 2023

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MWRA to Hold Remote Board of Directors Meeting on January 18, 2023

January 13, 2023

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MWRA 01/19/23 Test Operation May Cause Reduced Water Pressure, Discolored Water in Stoneham/Winchester

January 11, 2023

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MWRA 01/18/23 Test Operation May Cause Reduced Water Pressure, Discolored Water in Stoneham/Winchester

January 11, 2023

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MWRA Releases Annual Deer Island Outfall Monitoring Report

January 10, 2023

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MWRA to Temporarily Lower Water Level at Foss Reservoir for Invasive Plant Control

January 3, 2023

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MWRA to Temporarily Lower Water Level at Chestnut Hill Reservoir for Invasive Plant Control

January 3, 2023

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Update on Northern Extra High Pressure Zone Improvements - Section 63 (Contract 6522)

December 28, 2022

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Update on Section 89 Northern Intermediate High Pipeline Replacement: MWRA Contract 7117

December 28, 2022

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Update on Section 23, 24 and 47 Water Mains - Boston and Newton (Contract 6392)

December 28, 2022

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Update on Wachusett Dam Bastion Improvements (Contract 7697)

December 28, 2022

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Update for Nut Island Odor Control and HVAC Improvements: MWRA Contract
(Contract 7548)

December 28, 2022

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Update on Weston Aqueduct Supply Main Rehabilitation (WASM) - Arlington, Medford and Somerville (Contract 6544)

December 28, 2022

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MWRA Maintenance Expected to Impact Traffic along Medford Street & Canal Street, Malden

December 9, 2022

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MWRA Files EENF for Section 22 and Section 21 Water Pipeline Rehabilitation in Boston, Milton, and Quincy (Contract 7155)

November 28, 2022

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MWRA Releases North and South Studies Focused on Expanding Water Service to Several Communities

November 16, 2022

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Announcing the 2022-2023 Poster & Essay Contest

November 15, 2022

News Release Archive Page


Welcome To Deer Island Pier

Updated November 1, 2021

Visit our YouTube page here

SCATV Video Screen Shot

Mystic River Watershed Association Fighting Back Against Water Chestnut Invasion (via SCATV)

July 29, 2014

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Well vs. MWRA Water Taste Test
on Boston.com

July 22, 2013

Boston Globe Soudtrack Image

Boston Globe Magazine's Soundtrack video captures the "hypnotic sight and sound" of MWRA's Charlestown Wind Turbine

March 18, 2013

Power of Windmills Courtesy The Travel Channel

The Power of Windmills: Deer Island windmill featured in the Travel Channel's "Off Limits" clip

October 17, 2011

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NECN Presents Underneath it All:
Inside Boston's Sewer System

October 17, 2011

More Videos on Our YouTube Page

Water Reports

MWRA Annual Water Quality Report

2021 Annual Drinking Water Test Results


Monthly Drinking Water Quality Update


Monthly Community Water Use Report


Monthly Water Supply Status Update


Report on Quabbin Pilot Program (PDF)



Sewer Reports

MWRA Every Drop Counts

How Clean is Boston Harbor?

April 23, 2018

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A Healthy Environment Starts at Home

Our free guide to reducing the use of hazardous household products (PDF)

Annual Industrial Waste Report


CSO Post Construction Monitoring and
Performance Assessment Reports


CSO Annual Report: CSO Discharge Estimates and Rainfall Analyses for Calendar Year 2021


How Clean is Boston Harbor? MWRA Sewer Report


CSO Discharge Estimates and Rainfall Analyses


CSO Water Quality Report (PDF)


Annual CSO Control Plan Progress Report


Annual Infiltration/Inflow Report (PDF)



Harbor, Bay and NPDES Reports

State of Boston Harbor Report


Financial Reports

Final FY 2023 Assessments to Communities (Rates)


Final FY23 Capital Improvement Program (CIP)


Final FY23 Current Expense Budget (CEB)


Information for Investors and Capital Finance Business Partners


MWRA Annual Comprehensive Financial Report For the Fiscal Years Ended June 30, 2022 and 2021



Organization and Management Reports

Board of Directors Quarterly Report on Key Indicators of MWRA Performance


Master Plan



Court Report


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