Volunteer Monthly Monitoring Program - Charles River Watershed Association

CRWA Water Quality Monitoring Sites

Site(s) marked in red below are in need of at least one new water quality monitoring volunteer immediately.

Site availabilities are subject to change quickly. Please contact Delilah Bethel ( or fill out the Volunteer Monthly Monitoring Application Form if you are interested in volunteering.

Apply to Volunteer

Site # Town Site Location # of Vacancies
35CS Milford Central Street Bridge  **2
59CS Bellingham/Milford/Hopedale Mellen St. Bridge  1
90CS Bellingham Rt. 126, N. Main St.  
130S Bellingham Maple St. Bridge  
165S Franklin/Medway Shaw St./Elm St. Bridge  
199S* Norfolk Populatic Pond Boat Launch  
229S Millis Rt. 115, Baltimore St.  
267S Millis/Medfield Dwight St. Bridge  
269T Medfield Causeway St./Stop River  
290S Millis/Medfield West St./Dover Rd.  
318S Medfield /Sherborn Rt. 27 Bridge  
343S Sherborn/Dover Farm Rd./Bridge St.  
387S Wellesley/Dover Elm Bank/Cheney Dr. Bridge  1
400S Dover/Needham Charles River Road Bridge  
447S* Dover Dover Gage, Mill St.  
484S Dedham/Needham Greendale Ave/Lyons St (Dedham Medical Center)  
521S Dedham Ames St. Bridge  
534S Dedham/Boston Rt. 109 Bridge  
567S Newton/Needham Nahanton Park  
591S Newton/Wellesey Rt. 9 Gauging Station  
609S Wellesley/Newton Washington St. Bridge  
621S Weston/Newton Leo J. Martin Golf Course/Park Rd.  
635S Newton 2391 Commonwealth Ave.  
648S* Waltham Auburndale Park, Lakes Region  
662S Waltham Moody St. Bridge  
675S Waltham/Newton/Watertown North St. Bridge  
012S Watertown Watertown Dam Footbridge  
700S Watertown/Brighton N. Beacon St.  
715S Watertown/Brighton Arsenal St.  
729S Cambridge/Allston Eliot Bridge  
743S Cambridge/Allston Western Ave  
760T Boston Muddy River at CommonwealthAve  
763S Boston/Cambridge Massachusetts Ave. (Harvard) Bridge  
773S Cambridge Longfellow Bridge  
784S Boston/Cambridge New Charles River Dam  1
MB-D Bellingham 66 Beech St.  
MB-U Bellingham 450 Beaver St.  
HB-D Bellingham 490 Hartford Ave. 1
CB-U Bellingham 85 Prentice St.   
HB-U Medfield 416 Gorwin Dr. 1
CB-D Medfield 164 Main St.   
 *Site is not sampled during winter season  

Other Volunteer Opportunities

In an effort to ensure all sites are adequately covered every month, CRWA has established a system of regional samplers. Instead of being assigned to a single sampling site, like traditional sampling volunteers, these regional samplers are assigned to a set of 3-6 sites in the same area. 

Regional samplers still sample regularly every month, but rotate between the sites in their region. In the event a volunteer within their region cannot attend a sampling event on a given month, the regional sampler would sample in their place as a substitute. If all volunteers for a particular region are present for a given sampling event, the regional sampler will simply assist with sampling at one of the sites, in order to gain familiarity with site-specific details and the volunteers in their region.

Region Sampling Sites # of Vacancies
Bellingham 35CS, 59CS, 90CS, 130S, and 165S  
Medfield 199S, 229S, 267S, 269T, 290S, and 318S  
Needham – 1 343S, 387S, 400S, and 447S  
Needham – 2 484S, 521S, and 534S  
CRWA – 1 567S, 591S, and 609S  
CRWA – 2 621S, 635S, 648S, and 662S  
Cambridge – 1 675S, 012S, 700S, and 715S  
Cambridge – 2 729S, 743S, 760T, 763S, 773S and 784S  


We are also currently in need of a Regional Coordinator for the Cambridge Region. Instead of sampling water directly, this volunteer would meet volunteers dropping off their samples at the Eliot Bridge between 6:00 and 6:45 am on sampling mornings, and drive them to the CRWA office in Weston.

To volunteer for any of these positions, please contact Delilah Bethel ( or fill out the Volunteer Monthly Monitoring Application Form.

About Volunteer Monthly Monitoring

About Field Science

Project Manager

Delilah Bethel
Rita Baron Fellow
Bio | 781.788.0007 x231 | 

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