CSO/SSO Reports and Files (31 files)

Montague's CSO outfalls are located along the Connecticut River, adjacent to Power Street (downstream of the Turners Falls Dam) and Greenfield Road (below the Poplar Street put-in) in Turners Falls. CSO events may impact these area and any areas downstream as deicted in the mas above.

CSO overflows include stormwater that include, or likely include, some quantity of untreated or partially treated sewage and waste. 


Precautionary measures to be taken by the public following a CSO discharge event:

Avoid contact with these water bodies for 48 hours after the discharge or overflow ceases due to increased health risks from bacteria and other pollutants. See above for more information on whether specific resource areas, such as bathing beaches, are affected.

Report of Recent CSO Events

01/26/23 CSO Event at the Greenfield Road CSO (MON001). Discharge to Greenfield Road Outfall. Duration of  2 hours, 30 minutes beginning at 2:30am with released quantity of 222 gallons. Water body affected: Connecticut River

Note: immediate public notifications present the three-year avereage discharge associated with each of our three CSO locations. Those values are as follows:

Montague 3yr CSO Overflow Average per Incident 

2020 - 2022 (gallons)







Previous Monthly CSO Reports and Discharge Data Appear in Reports Provided Below