U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Cambridge Water Treatment Plant Tour


Walter J. Sullivan Water Treatment Facility
250 Fresh Pond Pkwy.
Cambridge, MA 02138

Get directions


  • West Cambridge
  • Strawberry Hill
  • North Cambridge
  • Neighborhood Nine
  • City Wide
  • Cambridge Highlands


(617) 349-4770


Calendar event image

Yes, every drop of Cambridge tap water at one point in time was part of Fresh Pond Reservoir.

Learn how the building on-site turns 8 to 14 million gallons of Fresh Pond into fresh drinking water every day.

You’ll have the chance to speak with water treatment staff, learn about the reservoirs by I-95, see the equipment in action and check out our water quality lab!

This program meets inside the main doors of the Cambridge Water Dept. building (facing the first parking lot). Open to all ages and the general public. Parking passes available.

Page was posted on 3/4/2024 12:30 PM
Page was last modified on 3/4/2024 12:42 PM
Contact Us

How can we help?

Please provide as much detail below as possible so City staff can respond to your inquiry:

As a governmental entity, the Massachusetts Public Records Law applies to records made or received by the City. Any information received through use of this site is subject to the same provisions as information provided on paper.

Read our complete privacy statement

Service Requests

Enter a service request via SeeClickFix for things like missed trash pickups, potholes, etc.