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Merrimack River Watershed Council

Protecting the Merrimack River and its watershed
for people and wildlife since 1976

CSO Updates

July 17, 2019— Three wastewater treatment plants have reported sewage overflows due to intense rainstorms that struck the Merrimack Valley Wednesday, however the releases appear to be minor in quantity. The Lowell plant reported its sewage overflow activated at 4:24 pm. and ended at 5:25 pm. No volume total has been reported. Greater Lawrence also reported a sewage overflow activation (start and end time was not reported), resulting in 429,000 gallons released into the river. That is a relatively minor release. Haverhill also reported a release from 12 of its 15 outflow pipes. No volume total was reported. Health officials recommend that people avoid swimming in the river for 48 hours after a sewage release. WCVB tv reported .58 inches of rain fell on the Lawrence area during the brief but intense storm.


Please see our CSO page for more information on combined sewage overflows.

Thank you to our latest 2019 corporate sponsors!

Contributor Level
Institution for Savings

Supporter Level
Bobrek Engineering & Construction

Enterprise Bank
FMN Services, Inc.
Fred C. Church Insurance
Horsley Witten Group
Lupoli Family Foundation
Paddle Boston
University of Massachusetts Lowell
Vesper Country Club

Interested in joining these organizations in supporting a clean, healthy and accessible Merrimack River? Learn more about our 2019 Corporate Sponsor program here.

Calendar of Events



Riverfront State Park, Lawrence, 9:00 to 11:00 AM

MRWC River City Cleanup Series: Lawrence

Join us for a cleanup at Lawrence's Riverfront State Park, right along the Merrimack. 

Riverfront State Park, Lawrence, MA, 9:00 to 11:00 AM