Drinking Water Quality

MWRA Annual Water Quality Report

Annual Water Report - 2023

CSO and SSO Notifications

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CSO and SSO Notifications

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Climate Change
Environmental Justice
Renewable Energy
CSO Control

Aqueduct Trails

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

Massachusetts Water Resources Authority
Deer Island, 33 Tafts Avenue
Boston, Massachusetts 02128

(617) 242-6000


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Wastewater COVID-19 Tracking

Updated: July 19, 2024

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PFAS Testing in MWRA Drinking Water

Updated April 2024

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

Important Notice

No current updates.

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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About Lead in
Drinking Water
How Much Water Is In Our Reservoirs?
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How much we have
How much we use

Recent and Historic Data
Harbor and Bay Monitoring
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Facts about Fluoride
MWRA's Free Drinking Water Fountain


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Quinapoxet River Dam Removal Project (Contract 7348)

July 9, 2024

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

July 2, 2024

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MWRA Advisory: July Valve Exercise Maintenance in the Greater Boston Area

July 2, 2024

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MWRA Distributes Annual Water Quality Report to Thousands of Residents

June 26, 2024

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MWRA to Hold Board of Directors Meeting on June 26, 2024

June 24, 2024

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State and Local Officials Break Ground to Remove Quinapoxet River Dam

June 17, 2024

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OPEB Meeting Notice for June 18, 2023

June 12, 2024

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Announcing the 2023-2024 Poster and Writing Contest Winners

May 30, 2024

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MWRA Asks Residents: Please Don't Swim in the Fells

May 28, 2024

Wachusett Dam Lower Gatehouse Pipe Repair Project

April 12, 2024

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Section 101 Extension

April 12, 2024

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Intermediate High Pipeline Improvements - Rehabilitation of Sections 24 and 25 Water Mains: Contract 6956

April 2, 2024

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

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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

2023 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


Annual CSO Control Plan Progress Report


Annual Infiltration/Inflow Report (PDF)



Harbor, Bay and NPDES Reports

State of Boston Harbor Report


Financial Reports

Preliminary FY 2025 Assessments to Communities (Rates)


Final FY24 Capital Improvement Program (CIP)


Final FY24 Current Expense Budget (CEB)


Information for Investors and Capital Finance Business Partners


MWRA Annual Comprehensive Financial Report For the Fiscal Years Ended June 30, 2023 and 2022



Organization and Management Reports

Board of Directors Quarterly Report on Key Indicators of MWRA Performance


Master Plan



Court Report


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