Sanitary Sewer Overflow Resolved in Greenfield

GREENFIELD – The City Greenfield, WPCF, DPW discovered a sanitary sewer overflow on July 10, 2023, 
at 12 p.m. The discharge consisted of untreated sewage and waste. The overflow concluded later that day at 5: 
24 p.m. 

The untreated sewage discharged from a regulator chamber outfall behind 302 Deerfield St. located along the Green River. This is located at Lat 42 0 34 37” Lon 76 0 36’ 33”.

The sewage discharged at a rate of 459 gallons per minute. It was caused by heavy to moderate rain during a flood watch. 

The sanitary sewer overflow impacts the Green River and Deerfield River in Greenfield, as well as the Connecticut River in Deerfield, Montague and Sunderland. 

As of 5:24 p.m. Monday, July 10, the discharge from the sanitary sewer overflow was over. 

The same precautions are set. Residents should avoid contact with these water bodies for 48 hours from the stop of the discharge due to increased health risks from bacteria and other pollutants. The 48 hours will expire on  Wednesday, July 12 at 5:24 p.m.

Total discharge is estimated to be approximately 142,290 gallons.

For additional information on discharges and overflows, visit