Sanitary Sewer Overflow Emerges in Greenfield on 7/21, Resolved on 7/22

GREENFIELD - The sanitary sewer overflow that surfaced in Greenfield on Friday, July 21, 2023, at 4:07 p.m. concluded on Saturday, July 22, at 11:49 a.m. The City Greenfield, WPCF, DPW reported the overflow’s conclusion. The discharge consisted of untreated sewage and waste.

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

The sanitary sewer overflow initially discharged at a rate of 1,500 gallons per minute. This morning, the rate was reduced to 695 gallons per minute. The overflow was caused by heavy to moderate rain during a flood watch.

The total discharge is estimated to be 1,410,000 gallons.

The sanitary sewer overflow impacts the Green River and Deerfield River in Greenfield, and the Connecticut River in Deerfield, Montague and Sunderland.
Avoid contact with these water bodies for 48 hours after the discharge’s conclusion due to increased health risks from bacteria and other pollutants. See the website for more information on whether specific resource areas, such as bathing beaches, are affected.

For additional information on discharges and overflows, visit