2015 Water Quality Report

2015 Water Sampling ChartLetter to Our CustomersAbout Our WaterHealth Information

About Our Water

Water Sources and How We Protect Them

Protecting the water supply at its source is the first step in achieving the water department’s goal of providing safe drinking water to its customers. The District’s reservoirs, located in Lewisboro, NY and New Canaan, CT, hold approximately one billion gallons of water. The source of the water is the watershed land covering 10 square miles in New Canaan, Ridgefield and Wilton, CT and Lewisboro, NY. Rainfall and snowmelt from this land are channeled into soils, groundwater, creeks and streams and then into our reservoirs. Disturbance or pollution on watershed land can directly affect the drinking water reservoirs.

Measures to protect the watershed land and reservoirs include daily patrolling of the area. Open communications with both the local police and fire departments in our watershed towns is essential. We also work closely with local government focusing attention on new land development in our watershed. When necessary we actively oppose unsuitable development. Each year our water treatment operators visit the properties on the watershed as part of our sanitary survey requirement.

Procedures to protect our groundwater sources in the Kellogg-Deering well field continue through the Aquifer Protection Area Regulations. The Norwalk Zoning Commission has used its authority to register and regulate businesses that pose a potential risk to our drinking water. The commission continues to provide updates to the registrants and work closely with the water department with regard to protection of our well field.

How FDWD Water Is Treated and PurifiedThe reservoir water is filtered at our treatment plant in New Canaan. The filtered water is then disinfected with chlorine to protect against any bacteria still present. We carefully monitor the amount of chlorine, adding the lowest quantity necessary to ensure the safety of your water without compromising the taste. Finally, chemicals are added to adjust the acidity, reduce the corrosivity and coat the pipes. This protects the pipes and keeps leaching of minerals such as lead and iron to a minimum. Fluoride is also added to prevent tooth decay. At the well field, the groundwater is filtered naturally by sand and gravel. The water is then treated in a similar manner as the surface water with the addition of aeration which removes contaminants and raises the pH.

Lead in the News

What happened in Flint Michigan: When the Flint, MI water department switched its water supply source, it apparently did not take the required steps to manage the resulting change in water chemistry. As a result, the new water source, with a low pH (acidic) and no corrosion control caused lead to leach from service lines, fixtures, and home plumbing that ended up in water drawn from the taps. To make matters worse, customer complaints of colored water from their taps were ignored.

The First District’s drinking water is lead-free when it leaves the treatment plant but lead can enter water that travels through a lead service pipe, lead solder or household plumbing containing lead.To comply with federal law, the First District collects water samples from household taps and tests these for lead and copper every three years. Federal law requires that at least 90 percent of the households tested have water below 15 parts per billion lead. Our tests have shown our water to comply with federal lead standards during the last sampling which was done in June of 2014. The next sampling event is next year (2017).

Source Water Assessment

A source water assessment performed by the State of Connecticut Department of Public Health indicated that the surface water source has a moderate susceptibility and the groundwater source a high susceptibility to potential sources of contamination. This does not imply poor water quality but does indicate the need for protection. The completed assessment report can be found on the Department of Public Health website.

Additional source water  assessment information can be found at the Environmental Protection Agency website at: www.epa.gov/sourcewaterprotection

Conserve Water, Save Money

Water is a precious commodity that we can preserve with some simple steps...


  • Repair faucet and toilet leaks
  • Take shorter showers and shut off water while shaving or brushing teeth
  • Replace old fixtures with new water saving devices
  • Keep water for drinking in the refrigerator
  • Run dishwasher and washing machine only when full


  • Water the lawn and garden in the early morning to avoid evaporation
  • Check that sprinklers don’t leak and that they water the  lawn and not the pavement
  • Use mulch around plants and shrubs to reduce evaporation

2015 Water Quality Report

2015 Water Sampling ChartLetter to Our CustomersAbout Our WaterHealth Information

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