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The Water System
Massachusetts Water Resources Authority


Every day Eastern Massachusetts residents quench their thirsts, bathe, flush toilets, do the dishes and water their lawns with water drawn from the MWRA water system.

Thanks to the Quabbin and Wachusett Watersheds and Reservoirs, 2.5 million people and 5,500 industrial users have one of the most abundant and high quality water supplies in the world.

Quabbin Reservoir

QUABBIN RESERVOIR
MWRA's primary water source.

HOW THE WATER SYSTEM WORKS

How the Water System Works

History of the MWRA Water System

DRINKING WATER QUALITY
How to Get Your Water Tested: List of DEP Certified Drinking Water Testing Labs
Frequently Asked Questions about MWRA Tap Water
      Facts about Lead

      Facts About Pharmaceuticals and MWRA Drinking Water

      Water hardness/softness

      Taste, Odor and Color Concerns

      Facts about Fluoride

      Water and Health

      No Perchlorate in MWRA Water
      Your Drinking Water and COVID-19
      About Cross Connections
      List of Local Water Department Contacts
      List of DEP Certified Drinking Water Testing Laboratories
DRINKING WATER TEST RESULTS

All Water Quality Test Results

     Annual Data

     Monthly Data
    List of Potential Contaminants Tested for in the MWRA Water System
    PFAS (Per-and Polyfluoroalkyl Substances)

    UCMR (Unregulated Contaminant Monitoring Rule) Data

    Additional Water Quality Data

MAJOR WATER FACILITIES
Overview of MWRA Water System
Water Supply (Reservoirs)
Integrated Water Supply Improvement Program

      Watershed Protection

      Water Treatment

      John J. Carroll Water Treatment Plant

      William A. Brutsch Water Treatment Facility

      Water Delivery: MetroWest Tunnel

      Covered Water Storage

      Distribution Pipeline Improvements

MAJOR WATER CONSTRUCTION PROJECTS
       Northern Intermediate High Project in Reading (7066)
       Northern Intermediate High Project in Reading and Woburn (7471)
       Northern Intermediate High Project in Stoneham (7067)
       Northern Intermediate High Project in Stoneham and Wakefield
       (7478)
       Southern Extra High Redundancy and Storage Project (7066)
       Water System Redundancy (PDF)
 Archive
METROPOLITAN WATER TUNNEL PROGRAM
Metropolitan Water Tunnel Program Main Page
WATER PROGRAMS
Community Support: Local Water System Assistance Program (LWSAP)
Community Support: Lead Service Line Replacement Loan Program or Lead Loan Program (LLP)an Enhancement to the Local Water System Assistance Program (LWSAP) for Member Communities
Water Testing - Laboratory Services
WATER SUPPLY AND DEMAND
Supply and Demand Statistics

Monthly Community Water Use Report

ADVISORY GROUP

Water Supply Citizens Advisory Committee (WSCAC)

WATER CONSERVATION AND EFFICIENCY

Water Conservation and Efficiency Main Page
Water conservation information for member community officials, local businesses and homeowners; free educational brochures and low-flow fixtures; case studies

Demand Management Report (PDF) Annually, MWRA prepares a demand management report (including water conservation) to meet the requirements of its National Pollution Discharge Elimination System (NPDES) Permit regarding wastewater flow to the Deer Island Treatment Plant.

PDF files on this site require Adobe Acrobat Reader® (free download).

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