Sanitary Sewer Overflow Continues in Greenfield as of Monday, December 18 at 6:30 P.M.

GREENFIELD –A sanitary sewer overflow that surfaced in Greenfield on Monday, December 18, 2023, at 10:30 a.m. remains ongoing as of Monday, December 18, 2023, at 6:30 p.m. We will share additional updates in eight hours from this release (3:00 a.m.) or when the overflow concludes.

The City Greenfield, WPCF, DPW reported the overflow immediately. The discharge consists 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 overflow is discharging at a rate of 366 gallons per minute. During the overflow’s peak, the overflow rate reached as high as 1,544 gallons per minute. It is caused by heavy to moderate rain during a flood watch.

The total discharge as of now from the overflow is 442,430 gallons.

The sanitary sewer overflow is impacting the Green River and Deerfield River in Greenfield, as well as the Connecticut River in Deerfield, Montague and Sunderland. The overflow does not impact drinking water. Avoid contact with these water bodies due to increased health risks from bacteria and other pollutants. Once the overflow concludes, community members will be asked to avoid contact with these water bodies for an additional 48 hours.

See the website for more information on whether specific resource areas, such as bathing beaches, are affected. For additional information on discharge, overflows and the water department, visit