General System

• The Commission has 230 employees.
• The Commission has approximately 250,000 customers.

Watersheds & Reservoirs

• Cobble Mountain & Borden Brook Reservoirs are the Commission’s main water supply
• There are 31,000 acres of watershed land surrounding the reservoirs (48.5 sq mi); 47% is owned by the Commission.
• Ludlow Reservoir is the Commission’s emergency water supply with 1,400 acres of protected land surrounding the reservoir.

Water Treatment (West Parish Filters)

• West Parish Filters was constructed in 1909.
• The plant was substantially modernized in 1974.
• Water production ranges from 30 to 50 MGD.
• The on-site laboratory analyzes approximately 50,000 samples per year.
• Chlorination was first utilized at West Parish Filters in 1965.

Power Generation (Cobble Mountain Hydro-Power Station)

• The Cobble Mountain Hydro-Power Station was built in 1930.
• At full capacity, the plant can produce 33 Megawatts/hour through 3 turbine generators.

Water Storage

• The Commission maintains 3 underground storage tanks within Provin Mountain.
• The storage tanks hold approximately 15 million gallons.
• The tanks were built between 1909 and 1960.

Distribution System

• There are 597 miles of pipe in the water distribution system.
• Approximately 151 miles of that pipe is over 100 years old.
• The Commission maintains 6,224 hydrants and 20,000 valves.

Wastewater Collection

• The Commission owns and maintains 471 miles of wastewater collection mains.
• Included in the system are the following: 11 manholes, 27 pump stations, and 7 flood control stations.
• There are 23 combined sewer overflow (CSO) outfalls located throughout the system.
• There are approximately 150 miles of combined sewer.

Wastewater Treatment (Bondi’s Island, SRWTF)

• Average daily treatment: 40 MGD
• Maximum capacity: 67 MGD
• Secondary treatment was added when the facility was modernized in 1977.