Secondary Started Summer 1989
Mercury Emissions Control 2002
Nitrogen Removal Started 2003, Substantial Completion July, 2015
12 – 21 million gallons/day
350 – 600 million gallons/month
6 – 7 billion gallons/year
In excess of 215 billion gallons since 1968
16 Operations, including managers, 3 shifts/day, 365 days/year
10 Maintenance & 2 laboratory, including managers
6 Executive Management and Administration
4 primary tanks at 1 million gallons each
6 aeration tanks at 1 million gallons each
6 final clarifiers at 1 million gallons each
2 half million gallon sludge storage tanks
23 Blowers ranging in size from 200 cfm to 12,000 cfm
98 Pumps ranging in size from 1 gpm to 15 mgd
150 Motors ranging in size from 1/4 hp to 400 hp
Three 2,400-volt 400-hp blowers for the aeration system
Six 200-hp 15-million gallon/day raw sewage pumps
Two 1.5-megawatt emergency generators, and one 1.25-megawatt emergency generator
Supervisory Control and Data Acquisition (SCADA) System with programmable logic controlers (PLCs). One person on each shift can manage the entire facility from the control room.
|2018 Average Daily Flows|
% of Total
- The Mattabassett District employs a sophisticated process to remove dissolved solids, organic material, and nutrients in wastewater. This process regularly removes at least 98% of these pollutants. Between May 1st and October 15th, the District disinfects the effluent with Sodium Hypochlorite before discharging to the Connecticut River.
- Accepts and treats septage and grease from septic tank cleaning trucks and liquid biosolids from other wastewater treatment plants.
- The District maintains a nine-mile concrete trunkline sewer which ranges in size from 60” to 72” in diameter. This trunkline conveys wastewater from New Britain, Berlin, Cromwell, and Middletown.
- Mattabassett uses 35,000 gallons of potable water each day. More importantly, we use over one million gallons of our own treated water saving more than $125,000 each month