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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Deerfield Resort Water System

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. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
2015ND50ND
2016ND90ND
2017N/A00N/A
2018N/A00N/A
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 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.

ppb = parts per billion

All test results

Date Result
2014-05-27ND
2014-05-27ND
2014-05-27ND
2014-05-27ND
2014-05-27ND
2014-09-29ND
2014-09-29ND
2014-09-29ND
2014-09-29ND
2014-09-29ND
2014-12-31ND
2014-12-31ND
2014-12-31ND
2014-12-31ND
2014-12-31ND
2015-12-29ND
2015-12-29ND
2015-12-29ND
2015-12-29ND
2015-12-29ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2016-12-25ND
2019-12-11ND
2019-12-11ND
2019-12-11ND
2019-12-11ND
2019-12-11ND
2019-12-11ND
2019-12-12ND
2019-12-12ND