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August 2018
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Volunteer news for Charles River Watershed Association's Volunteer Monthly Monitoring Program. Learn more at


The next sampling event is

Tuesday, August 21st, 2018 at 6:00 AM

If you are unable to make the sampling event and have not already done so, please let me and your sampling partner know as soon as possible!

Dear Friend,

Attached are the E.coli results from the July sampling event, also displayed on the map below. The July sampling event was classified as a wet weather event, in which 0.32 inches of rain fell in the three days preceding the sampling event.

In July, water samples were collected and tested for E.coli at 33 out of 35 sites. All but one site passed the boating standard (630 MPN/100mL), and 73% of sites passed the swimming standard (126 MPN/100mL). The highest E. coli levels were observed at site 269T, the Stop River in Medfield, with a concentration of 637 MPN/100mL.




Field Duplicates

The following sites should collect a field duplicate E. coli sample during the August 21st sampling event:

90CS - Rt. 126/N. Main St., Bellingham

290S - Old Bridge St., Medfield

400S - Charles River Rd. bridge, Wellesley

567S - Nahanton Park, Newton

743S - Western Ave. bridge, Cambridge


UMass Amherst Hydrogeology Sampling

Last summer we partnered with the Hydrogeology group at UMass Amherst to provide them with water samples from some of our sites on the Charles. This effort supported their study on the isotopic composition of surface and ground waters in the Northeast. You can read their report on last year's results from our watershed here.

This year, we will be partnering with them again to collect additional samples during August and September. The sites they have selected are:

35CS - Central St., Milford

130S - Maple St. bridge, Bellingham

229S - Rt. 115/Baltimore St., Millis

318S - Rt. 27 bridge, Medfield

400S - Charles River Rd. bridge, Dover

521S - Ames St. bridge, Dedham

567S - Nahanton Park, Newton

621S - Park Rd., Weston

662S - Moody St. bridge, Waltham

700S - N. Beacon St. bridge, Watertown

763S - Mass. Ave. bridge, Cambridge

784S - New Charles River Dam, Boston

If you sample at one of these sites, you should have received a small labelled bottle for sample collection. You can fill up the small bottle from your temperature bottle and transport it on ice to your regional drop-off site. If your site is on this list but do not have a small bottle for August, please let me know and we can arrange getting it to you.


Join Us at CRWA's 6th Annual Champions of the Charles Gala

Experience a magical night at the museum! Join Charles River Watershed Association for an evening of science, fun, and celebration at the Museum of Science on September 27th. We will honor Robert Zimmerman, CRWA Executive Director from 1990 - 2018, and John Sullivan of Boston and Water Sewer Commission for their tireless dedication to the Charles River.

Thursday, September 27, 2018
6:00 PM – 10:00 PM
Museum of Science
1 Science Park
Boston, MA 02114
More information


Charles River Clean Up Boat: Exclusive Volunteer Opportunity

Volunteer spots have become available on the Charles River Clean Up Boat, which goes out several times a week to pick trash out of the lower river. Two volunteer spots are available on the boat on each of the following days: September 5th, 6th, and 12th. The boat launches from Community Rowing in Newton at 9am and returns around 3pm. To reserve your spot, please write to Cindy Brown at and mention your involvement in the Volunteer Monthly Monitoring program at CRWA.


Breathing Room: Mapping Boston's Green Spaces Exhibit

Visit the exhibition Breathing Room: Mapping Boston's Open Spaces at the Boston Public Library in Copley Square. The exhibit will explore the past, present, and future of Boston's renowned green spaces. CRWA is co-sponsoring the event, which is open through the end of September

Thank you for all that you do for the river!  

Until next month,


Lisa Kumpf
Charles River Watershed Association
Office: 781-788-0007 ext. 228
Cell: 508-479-6489

"Saving the Charles River since 1965"


Mapping Boston's Green Spaces

Through September 30, 2018

More info


Champions of the Charles Gala 

Thursday, September 27, 2018

More info


"Saving the Charles River since 1965"

Our mission is to use science, advocacy and the law to protect, preserve and enhance the Charles River and its watershed.

For more information about CRWA and our current programs, please visit


We depend on you to help us continue our important programs and to continue the work we began a half-century ago. Please consider a gift today.