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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

City of Newark

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND30ND
2014ND10ND
2015ND30ND
2016ND30ND
2017ND40ND

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 Lab ID Result
2013-07-16Q1303832008ND
2013-07-16Q1303832007ND
2013-07-16Q1303832006ND
2014-07-22Q1429784004ND
2015-09-09Q1535008019ND
2015-09-09Q1535008003ND
2015-09-09Q1535008001ND
2016-09-07Q1636017010ND
2016-09-07Q1636017004ND
2016-09-07Q1636017002ND
2017-06-01Q1723403002ND
2017-06-01Q1723403004ND
2017-09-05Q1740964005ND
2017-09-05Q1740964001ND