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8/25/2020 - Pomperaug River Low-Flow Plan Action Level Reached

Third threshold, “Water Conservation Strongly Requested,” is reached;
people in the Pomperaug Basin asked to step up voluntary conservation efforts

River flows in the Pomperaug River have hit the third and final trigger in the low-flow operations plan. As called for in the plan, the Heritage Village Water Company, the Pomperaug River Watershed Coalition and the Town of Southbury are strongly requesting that the community, including residents, businesses and public agencies in the Pomperaug River Basin, voluntarily step up their water conservation efforts because of low flows in the river.

This is the last of three possible action levels identified in the plan. Customers of the Heritage Village Water Company and private well owners are always encouraged to use water wisely. Now that the “water conservation strongly requested” action level has been reached, they are being asked to increase their water conservation efforts. Private wells and public water supplies in the area draw water from the Pomperaug Aquifer, which can affect river flows.

“The Town of Southbury is setting a water conservation example for the community,” stated Jeffrey Manville, First Selectman of the Town of Southbury. Manville added, “The Department of Public Works will be limiting the washing of vehicles unless needed for maintenance, irrigation at town facilities will be reduced where possible and town hall has been requested to reduce water usage.” Manville further stated, “The Pomperaug River and its ecosystem are a vital asset to Southbury and neighboring communities. We all need to do our part during low-flow periods.”

The rearing and growth bioperiod, important developmental stages for aquatic life for the Pomperaug, occurs between July 1 and Oct. 31, and this is the kind of scenario that was envisioned when the low-flow operations plan was developed. The current river flow is less than 7 cubic feet per second, which is the third trigger. Based on United States Geological Survey records, the Pomperaug is at a level that is reached only once about every four years, on average.

table showing water conservation levels

In addition to these steps for customers, the stress on the Pomperaug River has been further reduced, as the water supply needs of the Towantic Energy Center LLC are being met with alternate water sources of Connecticut Water Company supplies outside of the Pomperaug River Basin.

While Heritage Village Water continues to have adequate water supplies to meet the daily needs of customers and provide the public with fire protection, it strongly requests that customers do what they can to reduce water usage to safeguard the health and habitat of the Pomperaug River. Heritage Village Water, the Pomperaug River Watershed Coalition and the Town of Southbury are depending on the public’s interest in safeguarding the Pomperaug River and its ecosystem to honor the latest conservation request.

Conditions are anticipated to improve later this week with rain expected. However, the longer term precipitation deficit continues to have an impact on groundwater supplies that sustain stream flow and conservation will still be requested during this dry summer season.

Heritage Village Water customers and private well owners can visit for water conservation tips. The current Pomperaug River status and action levels can be viewed online at

About Connecticut Water, Avon Water and Heritage Village Water

The companies are local water utilities, regulated by the Connecticut Public Utilities Regulatory Authority, which combined provide water services to more than 104,000 customers in 60 Connecticut towns and wastewater services to 3,000 customers in the town of Southbury, Connecticut. The towns served are Ashford, Avon, Beacon Falls, Bethany, Bolton, Brooklyn, Burlington, Canton, Chester, Clinton, Colchester, Columbia, Coventry, Deep River, Durham, East Granby, East Haddam, East Hampton, East Windsor, Ellington, Enfield, Essex, Farmington, Griswold, Guilford, Haddam, Hebron, Killingly, Killingworth, Lebanon, Madison, Manchester, Mansfield, Marlborough, Middlebury, Naugatuck, Old Lyme, Old Saybrook, Oxford, Plainfield, Plymouth, Portland, Prospect, Simsbury, Somers, South Windsor, Southbury, Stafford, Stonington, Suffield, Thomaston, Thompson, Tolland, Vernon, Voluntown, Waterbury, Westbrook, Willington, Windsor Locks and Woodstock.

About Pomperaug River Watershed Coalition

PRWC’s mission is to ensure plentiful high-quality water in the Pomperaug Watershed communities through the use of science and education. We share our knowledge and expertise with others committed to the protection of the vital water resources upon which we all depend. PRWC accomplishes its mission by employing the latest science to advance best management of the watershed and by creating a partnership of local governments, businesses, private individuals, scientists and environmental groups that work collaboratively to protect the health and vibrancy of the watershed. PRWC’s programs and services include development and acquisition of scientific watershed and river data, provision of technical assistance on environmental challenges, and facilitation of educational programs. All of PRWC’s programs and activities underscore our collective roles as stewards of our environment and promote good habits to keep our watershed and rivers healthy.

About the CPV Towantic Energy Center

The CPV Towantic Energy Center (CPV Towantic) is an 805-megawatt, natural-gas-fueled combined-cycle electric generating facility operating in the Woodruff Hill Industrial Park in Oxford, Connecticut. The facility generates enough electricity to power nearly 800,000 homes, helping Connecticut to safely meet its demand for energy with reliable, cost-effective and environmentally responsible low emissions generation. Displacing the need for older, less efficient generators, CPV Towantic lowers overall emissions and improves the state’s environmental profile. CPV Towantic’s innovative design also incorporates advanced air-cooling technology, which conserves natural resources by reducing water use by approximately 85% compared to traditional facilities. The project is owned by Competitive Power Ventures Inc. and its partners, including Osaka Gas USA, and is being managed by CPV and operated by NAES Corporation. For more information, see