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Warwick, RI Water Quality Report

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Sources Of Drinking Water in Warwick, Rhode Island

Where does Warwick, RI get its water from?  The Kent County Water Authority purchases approximately 80% of Warwick's water from the Providence Water Supply Board. This supply is treated surface water from the following reservoirs located in the central part of the state: Scituate, Moswansicut, Ponaganset, Barden and Westconnaug reservoirs. The remainder of you water is produced from the following groundwater resources: Mishnock wells #1 and #3 located off Nooseneck Hill Road bordering Coventry and West Greenwich, Spring Lake well located off Tiogue Avenue, Coventry and our East Greenwich well located off Post Road at the Warwick and East Greenwich line. KCWA also wholesales water to the City of Warwick to supply the Potowomut section. 

 The gasoline additive Methyl Tertiary Ether (MTBE) is not a regulated substance requiring testing under the Safe Drinking Water Act. The increasing occurrence of groundwater contamination by this product has prompted an initiative for surveillance testing as an indicator of contamination potential in local aquifers. The Rhode Island Department of Health maintains the present health advisory (ha) level at 40 ppm. Testing conducted of the Kent County Water Authority’s groundwater resources revealed a detection of 1.0 ppb in the Spring Lake Well, 1.2ppb Mishnock Well and 1.0 ppb in the East Greenwich Well. The levels observed in this reporting period are below the Department of Health 40 ppm health advisory level. Currently, this level of detection is not considered at risk for public drinking water concern by the Rhode Island Department of Health, but is a strong indicator of just how vulnerable to contamination our drinking water sources can be. Is Warwick's water safe to drink? Does Warwick put fluoride in their water?

Source: City of Warwick

Contaminants Found in Warwick'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.

Dichloroacetic acid

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

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.

Trichloroacetic acid

Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. 

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 dichloroacetic acid in excess of health guideline

Cancer: The health guideline of 0.7 ppb for dichloroacetic acid was defined by the Environmental Protection Agency 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 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 trichloroacetic acid in excess of health guideline

Cancer: The health guideline of 0.5 ppb for trichloroacetic acid was defined by the Environmental Protection Agency 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.

Contaminant Levels in Warwick, RI Compared to Other Regions

Bromodichloromethane

- Health Guideline: 0.06 ppb

 - State: 2.08 ppb

 - Warwick, RI: 10.00 ppb

 - National: 4.38 ppb

Chloroform

 - Health Guideline: 1.0 ppb

 - State: 9.88 ppb

 - National: 11.4 ppb

 - Warwick, RI: 44.1 ppb

Dichloroacetic acid

 - Health Guideline: 0.7 ppb

 - State: 6.47 ppb

 - National: 6.00 ppb

 - Warwick, RI: 13.8 ppb

Total trihalomethanes (TTHMs)

 - Health Guideline: 0.8 ppb

 - State: 41.1 ppb

 - National: 23.4 ppb

 - Warwick, RI: 50.4 ppb

Trichloroacetic acid

 - Health Guideline: 0.5 ppb

 - State: 3.29 ppb

 - National: 4.93 ppb

 - Warwick, RI: 1.42 ppb

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April Jones

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

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