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Marietta, Cobb County, Georgia Water Quality Report

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Sources Of Drinking Water in Marietta, Cobb County, Georgia

The Cobb County-Marietta Water Authority withdraws water from the Chattahoochee River and Allatoona Lake and purifies it. The treatment plant located on Lower Roswell Road in Marietta treats water withdrawn from the Chattahoochee River. Is Cobb county water safe to drink? Is Marietta's water safe to drink?

Contaminants Found in Cobb County'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.

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.

Radiological Contaminants

This utility detected Radium, combined (-226 & -228) & Radium-228. Radiological contaminants leach into water from certain minerals and from mining. Drinking water contamination with radioactive substances increases the risk of cancer and may harm fetal development.

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 — moreso 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.

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 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.

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.

Health risks of Radiological Contaminants  in excess of health guidelines

No standards exist for this contaminant

Health risks of Fluoride Contaminants  in excess of health guidelines 

No standards exist for this contaminant

Water Contaminant Levels in Marietta, Cobb County, Georgia Compared to Other Regions

Bromodichloromethane

 - Health Guideline: 0.4 ppb

 - State: 1.78 ppb

 - National: 4.37 ppb

- Cobb County, GA: 8.55 ppb

Chloroform

 - Health Guideline: 1.0 ppb

 - State: 6.66 ppb

 - National: 11.4 ppb

 - Cobb County, GA: 30.2 ppb

Chlorate

 - Health Guideline: 210 ppb

 - State: 97.6 ppb

 - National: 114.0 ppb

 - Cobb County, GA: 272.5 ppb

Chromium (hexavalent)

 - Health Guideline: 0.02 ppb

- State: 0.140 ppb

 - Cobb County, GA: 0.0850 ppb

 - National: 0.782 ppb

Dibromochloromethane 

 - Health Guideline: 0.7 ppb

 - State: 0.716 ppb

 - Cobb County, GA: 2.30 ppb

 - National: 2.99 ppb

Dichloroacetic acid

 - Health Guideline: 0.7 ppb

 - State: 3.19 ppb

 - National: 6.00 ppb

 - Cobb County, GA: 12.1 ppb

Total trihalomethanes (TTHMs)

 - Health Guideline: 0.8 ppb

 - State: 11.8 ppb

 - National: 23.4 ppb

 - Cobb County, GA: 41.1 ppb

Trichloroacetic acid

 - Health Guideline: 0.5 ppb

 - State: 3.65 ppb

 - National: 4.93 ppb

 - Cobb County, GA: 9.98 ppb

Fluoride

 - Health Guideline: None

 - State: 0.405 ppb

 - National: 0.440 ppb

 - Cobb County, GA: 0.710 ppb

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April Jones

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

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