John J. Carroll Water Treatment Plant | |
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Main entrance | |
General information | |
Status | In operation |
Address | 84 D’Angelo Drive |
Town or city | Marlborough, Massachusetts |
Country | United States |
Coordinates | 42°18′47″N71°35′04″W / 42.313052°N 71.584402°W Coordinates: 42°18′47″N71°35′04″W / 42.313052°N 71.584402°W |
Construction started | March 1999 |
Completed | March 2005 |
Opened | July 27, 2005 |
Cost | US$340 million |
Owner | Massachusetts Water Resources Authority |
[1] [2] |
The John J. Carroll Water Treatment Plant (CWTP) is a water treatment plant operated since 2005 by the Massachusetts Water Resources Authority (MWRA) to treat water bound for Greater Boston. The plant is located at the town lines of Marlborough, Northborough, and Southborough, Massachusetts.
CWTP is named after John J. Carroll, an original member of the Massachusetts Water Resources Authority (MWRA) board of directors. [3] [2] It was constructed from 1999 to 2005, and opened in July 2005. [1] It replaced a prior facility only used for pH control.[ citation needed ] In addition to water treatment, CWTP has five concrete contact chambers capable of storing 11.3 million US gallons (43 million litres). [1] Its construction budget was US$340 million. [1]
For water treatment, CWTP utilizes four ozone generators, designed to handle an average capacity of 275 million US gallons (1,040 million litres) per day—although average daily consumption is lower, at approximately 200 million US gallons (760 million litres)—and a peak level of 405 million US gallons (1,530 million litres) per day. [2] Ultraviolet light treatment was added in April 2014. [4] [2] A 500 kW photovoltaic array is used to harness solar energy, reducing operational cost. [2]
As of February 2019 [update] , water treatment performed at CWTP consists of: [2] [5]
Treatment | Purpose |
---|---|
Ozone | Cryptosporidium inactivation, Giardia inactivation |
Sodium bisulfite | Ozone removal |
Ultraviolet light | Water disinfectant |
Sodium hypochlorite | Residual disinfection |
Hydrofluorosilicic acid | Dental health |
Aqueous ammonia | Residual disinfection |
Sodium carbonate | Increase alkalinity for pH buffering |
Carbon dioxide | Adjust pH level |
Water for CWTP comes from the Wachusett Reservoir, primarily via the Cosgrove Tunnel, with the Wachusett Aqueduct as a standby backup. Treated water then flows towards Boston primarily via the MetroWest Water Supply Tunnel, with the Hultman Aqueduct as a secondary system and the Weston Aqueduct as a backup. [6]
The Quabbin Reservoir is the largest inland body of water in Massachusetts, and was built between 1930 and 1939. Today, along with the Wachusett Reservoir, it is the primary water supply for Boston, some 65 miles (105 km) to the east as well as 40 other communities in Greater Boston. It also supplies water to three towns west of the reservoir and acts as backup supply for three others. By 1989, it supplied water for 2.5 million people, which was about 40% of the state's population at the time. It has an aggregate capacity of 412 billion US gallons (1,560 GL) and an area of 38.6 square miles (99.9 km2).
The Massachusetts Water Resources Authority (MWRA) is a public authority in the Commonwealth of Massachusetts that provides wholesale drinking water and sewage services to certain municipalities and industrial users in the state, primarily in the Boston area.
The Wachusett Reservoir is the second largest body of water in the state of Massachusetts. It is located in central Massachusetts, northeast of Worcester. It is part of the water supply system for metropolitan Boston maintained by the Massachusetts Water Resources Authority (MWRA). It has an aggregate capacity of 65 billion US gallons (250,000,000 m3) and an area of almost 7 square miles (18.2 km²). Water from the Wachusett flows to the covered Norumbega Storage Facility via the Cosgrove Tunnel and the MetroWest Water Supply Tunnel. The reservoir has a maximum depth of 120 feet and a mean depth of 48 feet.
The Quabbin Aqueduct carries water from the Quabbin Reservoir to the Wachusett Reservoir. It is part of the Eastern Massachusetts public water supply system, maintained by the Massachusetts Water Resources Authority (MWRA). At 25 miles (40 km) in length, it is one of the longest aqueduct tunnels in the world being 1⁄2 mile (0.8 km) shorter than the Hetch Hetchy Aqueduct.
The Ware River Diversion is a dam on the Ware River. It is part of the Boston, Massachusetts public water supply system, maintained by the Massachusetts Water Resources Authority (MWRA). It is located in Worcester County in the town of Barre, close to its border with Oakham.
The Ware River is a 35.4-mile-long (57.0 km) river in central Massachusetts. It has two forks, the longer of which begins near Hubbardston, Massachusetts. The Ware River flows southwest through the middle of the state, joins the Quaboag River at Three Rivers, Massachusetts, to form the Chicopee River on its way to the Connecticut River.
The Wachusett Aqueduct is a secondary aqueduct that carries water from the Wachusett Reservoir to the John J. Carroll Water Treatment Plant at Walnut Hill in Marlborough, Massachusetts. It is part of the public water supply system for the communities of Greater Boston that are served by the Massachusetts Water Resources Authority (MWRA), which manages the aqueduct. The aqueduct serves as a standby backup to the Cosgrove Tunnel.
The Deer Island Waste Water Treatment Plant is located on Deer Island, one of the Boston Harbor Islands in Boston Harbor. The plant is operated by the Massachusetts Water Resources Authority (MWRA) and began partial operations in 1995. The facility was fully operational in 2000 with the completion of the outfall tunnel.
The Quinapoxet River is part of the Nashua River watershed in northern Massachusetts in the United States. It is part of the Massachusetts Water Resources Authority water system supplying drinking water to the greater Boston area.
The Stillwater River is part of the Nashua River watershed. This river is part of the Massachusetts Water Resources Authority system that supplies drinking water to the greater Boston area.
The Weston Reservoir is part of the greater Boston water supply maintained by the Massachusetts Water Resources Authority. It is located in central Weston, with its principal public access point on Ash Street.
The Barre Falls Dam is located on the Ware River in Barre, Massachusetts, about 0.3 mile (0.48 km) below the junction of the river's east and west branches and 13 miles (21 km) northwest of Worcester, Massachusetts.
The MetroWest Water Supply Tunnel (MWWST) is an advanced underground aqueduct that supplies potable water to residents of much of Greater Boston. It is part of the Massachusetts Water Resources Authority (MWRA) water supply system, having entered operation in November 2003.
The Cosgrove Aqueduct, also called the Cosgrove Tunnel, forms part of the water supply system for the communities of the Greater Boston area in eastern Massachusetts that are served by the Massachusetts Water Resources Authority. It is a man-made tunnel connecting the eastern end of the Wachusett Reservoir to the John J. Carroll Water Treatment Plant in Marlborough. From the treatment plant, water is delivered to the Boston area primarily by the MetroWest Water Supply Tunnel.
A. David Mazzone served for twenty-six years as a United States District Judge of the United States District Court for the District of Massachusetts.
The Weston Aqueduct is an aqueduct operated by the Massachusetts Water Resources Authority (MWRA). Now part of the MWRA backup systems, it was designed to deliver water from the Sudbury Reservoir in Framingham to the Weston Reservoir in Weston. The 13.5-mile (21.7 km) aqueduct begins at the Sudbury Dam, and passes through the towns of Southborough, Framingham, Wayland, and Weston. In 1990, the route, buildings and bridges of the aqueduct were added to the National Register of Historic Places as the Weston Aqueduct Linear District.
The Sudbury Aqueduct is an aqueduct in Massachusetts. It runs for 16 miles (26 km) from Farm Pond at Waverly Street in Framingham to Chestnut Hill Reservoir in Boston’s Chestnut Hill neighborhood. A later built extension main runs from the Farm Pond gatehouse to the gatehouse at the Stearns Reservoir where additional mains connect to the Brackett and Foss Reservoirs Going east from Framingham, it runs through Sherborn before entering Natick. From Natick it runs east through Wellesley and Needham to the Charles River, which it crosses on the Echo Bridge into Newton. It ends at the Chestnut Hill Reservoir on the Newton side of the Newton-Boston line. The Massachusetts Water Resources Authority (MWRA) operates the aqueduct.
The Hultman Aqueduct forms part of the water supply system of eastern Massachusetts, managed by the Massachusetts Water Resources Authority (MWRA). The aqueduct extends from Southborough to Weston, connecting the Cosgrove Tunnel to the distribution network in the Greater Boston area. Opened in 1939, it replaced the Weston Aqueduct. It is now itself a secondary system, having been supplanted as the primary conduit in 2003 by the MetroWest Water Supply Tunnel. From 2009 to 2014, it was rehabilitated and taken offline, in order to repair leaks which were causing losses of at least 400,000 US gallons (1,500,000 L) of water per day in the 1990s.
The 2010 Boston Water Emergency occurred on May 1, 2010, when a water pipe in Weston, Massachusetts, broke and began flooding into the Charles River. This led to unsanitary water conditions in the greater Boston area, which resulted in Governor Deval Patrick declaring a state of emergency and an order for residents to boil drinking water. The leak was stopped on May 2. On May 4, the order was lifted. President Barack Obama signed an emergency disaster declaration offering federal help, authorizing the Department of Homeland Security and Federal Emergency Management Agency to coordinate disaster relief efforts with Massachusetts.
The Sudbury Reservoir is an emergency backup Boston metropolitan water reservoir in Massachusetts, located predominantly in Southborough and Marlborough, with small sections in Westborough and Framingham. It was created when the Sudbury Dam was constructed to impound the Stony Brook branch of the Sudbury River; no part of the reservoir lies in the town of Sudbury. Nearly 5,000 acres (2,000 ha) in the Sudbury Reservoir watershed are administered by the Massachusetts Department of Conservation and Recreation as a limited-access public recreation area.