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Stamford, CT Water Quality Report

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Sources Of Drinking Water in Stamford, Connecticut

Where does Stamford's water come from? Stamford's water is collected in reservoirs and wells, treated, and delivered to you through an extensive underground piping system. The Stamford System supply, which serves about 119,500 people, is mostly surface water drawn from a network of five reservoirs (Laurel and North Stamford in Connecticut, and Mill, Trinity, and Siscowit in New York). Water also is drawn from Aquarion’s Southwest Regional Pipeline, supplied from the Canal Street and Coleytown well fields in Westport, and Hemlocks Reservoir in Fairfield. Additionally, water sometimes is drawn from the Mianus surface supply in Greenwich. 

The reservoirs supply approximately 99% of the 16.9 million gallons of water per day that customers use on average. Company wide, an average of 13.9% of the demand is water drawn for firefighting, water main cleaning, water main breaks and leaks, and unauthorized use.Is Stamford's water safe to drink? Does Stamford put fluoride in the water? 

Source: City of Stamford, Connecticut

Contaminants Found in Stamford's Water Supply

(Detected above health guidelines)

Bromodichloromethane

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

Chloroform

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

Chromium (hexavalent)

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater.

Dibromochloromethane

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water.

Total trihalomethanes (TTHMs)

Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform. 

Fluoride

Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems. The fluoride that is added to water is not the naturally occurring kind, the main chemicals used to fluoridate drinking water are known as “silicofluorides” (i.e., hydrofluorosilicic acid and sodium fluorosilicate). Silicofluorides are not pharmaceutical-grade fluoride products; they are unprocessed industrial by-products of the phosphate fertilizer industry (Gross!). Since these silicofluorides undergo no purification procedures, they can contain elevated levels of arsenic — more so than any other water treatment chemical. In addition, recent research suggests that the addition of silicofluorides to water is a risk factor for elevated lead exposure, particularly among residents who live in homes with old pipes.  Some have hypothesized that community water containing sodium silicofluoride and hydrofluosilicic acid may increase blood lead (PbB) concentrations in children by leaching of lead from water conduits and by increasing absorption of lead from water but further studies are needed.

Potential Health Effects of Consuming These Contaminants

Health risks of bromodichloromethane in excess of health guideline

Cancer: The health guideline of 0.4 ppb for bromodichloromethane was defined by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

Health risks of chloroform in excess of health guideline

Cancer: The health guideline of 1 ppb for chloroform was defined by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

Health risks of chromium (hexavalent) in excess of health guideline

Cancer: The health guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

Health risks of trihalomethanes in excess of health guideline

Cancer: The health guideline of 0.8 ppb for trihalomethanes was defined by the California Office of Environmental Health Hazard Assessment as a draft public health goal, the level of drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

Health risks of dibromochloromethane  in excess of health guidelines

Cancer & Birth Defects: Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

Contaminant Levels in Stamford, CT Compared to Other Regions

Bromodichloromethane

- Health Guideline: 0.06 ppb

 - State: 2.00 ppb

 - Stamford, CT: 9.51 ppb

 - National: 4.38 ppb

Chloroform

 - Health Guideline: 1.0 ppb

 - State: 6.93 ppb

 - National: 11.4 ppb

 - Stamford, CT: 30.7 ppb

Chromium (hexavalent)

 - Health Guideline: 0.02 ppb

 - Stamford, CT: 0.0674 ppb

 - State: 0.144 ppb

 - National: 0.782 ppb

Dibromochloromethane  

 - Health Guideline: 0.1 ppb

 - State: 0.992 ppb

 - National: 3.01 ppb

 - Stamford, CT: 2.16 ppb

Total trihalomethanes (TTHMs)

 - Health Guideline: 0.8 ppb

 - State: 19.4 ppb

 - National: 23.4 ppb

 - Stamford, CT: 43.7 ppb

Fluoride

 - Health Guideline: None

 - State: 0.189 ppb

 - National: 23.4 ppb

 - Stamford, CT: 0.463 ppb

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April Jones

A colorado based hiker, blogger, and water quality expert...

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