Download your report and letter.
MASSACHUSETTS WATER RESOURCES AUTHORITY
Charlestown Navy Yard 100 First Avenue,
Building 39
Boston, MA 02129
2021 CONSUMER CONFIDENCE REPORT FOR DEER ISLAND
Public Water Supply
# 6000000
The MWRA Waterworks Division appreciates this opportunity to provide MWRA staff on Deer Island with this annual report on the quality of your drinking water. This consumer confidence report (CCR) includes water testing results for 2021, information on MWRA’s water treatment and disinfection processes, and MWRA’s efforts to improve the water distribution system. MWRA supplies wholesale water to local water departments in 53 cities and towns as well as Deer Island, which is its own DEP recognized Public Water Supply.
The report is attached and will be posted online at: Annual Drinking Water Quality Test Results for 2021 for your review.
This water quality report reflects the significant, ongoing efforts and expertise of MWRA staff at Deer Island as well as waterworks staff who ensure the safety of the drinking water supplied to you and 3.1 million people, and protect the environment around our water supplies and communities.
The report also provides information about source water and finished water leaving the John J. Carroll Water Treatment Plant. This memo provides details about water tested at Deer Island itself.
Lead and Copper Results
We test for lead at 10 sites once a year to determine the levels of lead and copper at taps and fountains at Deer Island, and to assess MWRA’s corrosion control treatment. In September 2021, the 90th percentile for Deer Island water testing results for lead was 1.42 parts per billion (ppb), compared to the Lead Action Level (AL) of 15 ppb, and testing results for copper were 201 ppb, compared to the AL of 1300 ppb. Both lead and copper levels were significantly below the AL’s. For additional information on the potential health impacts of lead in drinking water, and steps that may be taken at work or at home to reduce exposure to lead, please see page 4 and 5 of the 2021 report.
Total Coliform Testing
Deer Island tests weekly for bacteria in drinking water sites. No bacteria positive samples were found during 2021.
If you would like to learn more about the water that MWRA supplies, about other MWRA activities and projects, or about MWRA meetings that are open to the public, please visit our website at www.mwra.com. If you have any questions, please call 617-242-5323.
Thank you for your interest in MWRA’s water quality, and for your continued efforts to support MWRA’s mission.
Sincerely yours,
Steven Estes-Smargiassi
Director, Planning & Sustainability
Bryan Pyburn
Supervisor, Inspection,
Water Operations & Maintenance
Updated June 14, 2022