Home » News » Public Safety
Sewage odor complaints stop in Derry, but officials monitoring plant
The strong odor was likely caused by an excessive buildup of sludge at the bottom of two lagoons over the unusually frigid winter, Tom Carrier, deputy director of Public Works, said during the Town Council meeting Tuesday night.
In late May, the smell affected Londonderry residents living in the area near Home Depot and Market Basket, Carrier said.
“Fortunately, it’s over,” he said. “We haven’t received any complaints in recent days.”
Derry’s facility is somewhat unique in the state in that it incorporates a system of two large, open lagoons to break down and treat millions of gallons of untreated sewage. Each lagoon is 20 feet deep and contains 42 million gallons. The facility is one of the largest of its kind in the country, Carrier said.
Over the winter, the biological activity decreases, and a layer of sludge builds up and falls to the bottom of the ponds to lie dormant. In the spring, as it becomes warmer, bacteria become active again and begin breaking down the waste. As this process occurs, gases such as hydrogen sulfide, which has a rotten egg-like smell, are produced, Carrier said.
While they are fairly certain about what caused the odor, administrators will continue to review the data to see if there could have been another cause, such as a possible shock overload to the system, Carrier said.
READER COMMENTS: 0
- Investigators release sketch of man who may have driven Abigail away - 1
- Supporters ask for patience in Abby Hernandez case while authorities sort it all out - 9
- Package found at Manchester federal building was harmless - 0
- Tractor-trailer carrying glass rolls over at I-93-Route 101 interchange in Manchester - 0
- Contact lost with Air Algerie plane carrying 116 people from Burkina Faso - 0
- New Ipswich man dies in motorcycle, truck collision - 0
- Two hurt in crash on Everett Turnpike involving tractor-trailer - 0
- Lightning likely cause of Manchester apartment building fire - 0
- Motorcyclist seriously injured in Jaffrey crash - 0
READER COMMENTS: 0
- Another View -- Jayne Millerick: Dems scaring women by misleading them on contraception - 0
- Basket case: Saga of a supermarket - 0
- Patriots Notebook: Ongoing renovations in Foxborough - 0
- Three years later, investigation continues into homicide of Celina Cass - 0
- Nashua celebration in the works for Medal of Honor recipient - 0
- Fisher Cats down Senators in road trip opener - 0
- No water for Manchester sewer bill scofflaws? - 0
- New Boston mulch processing plant plans under review - 0
- Manchester Crimewatch: Defense attorney seeks home confinement for drug addict - 0
Market Basket walkout a future case study
UPDATED: Thousands of Market Basket employees rally; company board issues statement on purchase offer, reaffirms support for new CEOs
Basket case: Saga of a supermarket