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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

New Philadelphia City PWS

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

 

160

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.259 ppb356ND - 3.78 ppb
20150.0427 ppb261ND - 1.11 ppb
20160.0419 ppb261ND - 1.09 ppb
20170.0423 ppb261ND - 1.10 ppb
20180.0546 ppb261ND - 1.42 ppb
2019ND210ND

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
2014-02-0314020023ND
2014-02-0314020024ND
2014-02-0314020025ND
2014-02-0314020026ND
2014-03-12140312983.78 ppb
2014-03-1214031299ND
2014-03-1214031300ND
2014-03-12140313012.23 ppb
2014-03-12140313020.620 ppb
2014-05-05140509010.574 ppb
2014-05-0514050902ND
2014-05-0514050903ND
2014-05-0514050904ND
2014-05-1314051927ND
2014-05-1314051928ND
2014-05-1314051929ND
2014-05-1314051930ND
2014-05-1314051931ND
2014-08-05140801801.31 ppb
2014-08-05140801810.547 ppb
2014-08-2614083001ND
2014-08-2614083002ND
2014-08-2614083003ND
2014-08-2614083004ND
2014-08-2614083005ND
2014-08-2614083006ND
2014-08-2614083007ND
2014-08-2614083008ND
2014-08-2614083009ND
2014-08-2714083010ND
2014-11-0514110416ND
2014-11-0514110417ND
2014-11-0514110418ND
2014-11-0514110419ND
2014-11-0514110420ND
2015-03-1115031288ND
2015-03-1115031289ND
2015-03-1115031290ND
2015-03-1115031291ND
2015-03-1115031292ND
2015-05-1315051542ND
2015-05-1315051543ND
2015-05-1315051544ND
2015-05-1315051545ND
2015-05-1315051546ND
2015-07-29150740671.11 ppb
2015-07-2915074068ND
2015-07-2915074057ND
2015-07-2915074058ND
2015-07-2915074059ND
2015-07-2915074060ND
2015-07-2915074061ND
2015-07-2915074062ND
2015-07-2915074063ND
2015-07-2915074064ND
2015-07-2915074065ND
2015-11-0415110277ND
2015-11-0415110278ND
2015-11-0415110279ND
2015-11-0415110280ND
2015-11-0415110281ND
2016-02-0316020270ND
2016-02-0316020271ND
2016-02-0316020272ND
2016-02-0316020273ND
2016-02-0316020274ND
2016-05-1816051995ND
2016-05-1816051996ND
2016-05-1816051997ND
2016-05-1816051998ND
2016-05-1816051999ND
2016-08-01160800501.09 ppb
2016-08-0116080051ND
2016-08-0116080052ND
2016-08-0116080053ND
2016-08-0116080054ND
2016-08-0116080055ND
2016-08-0116080056ND
2016-08-0116080057ND
2016-08-0116080058ND
2016-08-0116080059ND
2016-08-0116080060ND
2016-11-1416111545ND
2016-11-1416111546ND
2016-11-1416111547ND
2016-11-1416111548ND
2016-11-1416111549ND
2017-03-0217030238ND
2017-03-0217030239ND
2017-03-0217030240ND
2017-03-0217030241ND
2017-03-0217030242ND
2017-05-0117050072ND
2017-05-0117050073ND
2017-05-0117050074ND
2017-05-0117050075ND
2017-05-0117050076ND
2017-07-0317070030ND
2017-07-0317070031ND
2017-07-0317070032ND
2017-07-0317070033ND
2017-07-0317070034ND
2017-07-0317070037ND
2017-07-0317070036ND
2017-07-0317070035ND
2017-07-0317070038ND
2017-07-05170704641.10 ppb
2017-07-0517070465ND
2017-11-0917110947ND
2017-11-0917110948ND
2017-11-0917110949ND
2017-11-0917110950ND
2017-11-0917110951ND
2018-01-1818011597ND
2018-01-1818011598ND
2018-01-1818011599ND
2018-01-1818011600ND
2018-01-1818011601ND
2018-04-0218040034ND
2018-04-0218040035ND
2018-04-0218040036ND
2018-04-0218040037ND
2018-04-0218040038ND
2018-07-0218070046ND
2018-07-0218070047ND
2018-07-0218070048ND
2018-07-0218070049ND
2018-07-0218070050ND
2018-07-02180700551.42 ppb
2018-07-0218070056ND
2018-07-0218070051ND
2018-07-0218070052ND
2018-07-0218070053ND
2018-07-0218070054ND
2018-11-0618110469ND
2018-11-0618110470ND
2018-11-0618110471ND
2018-11-0618110472ND
2018-11-0618110473ND
2019-01-1119011320ND
2019-01-1119011321ND
2019-01-1119011322ND
2019-01-1119011323ND
2019-01-1119011324ND
2019-04-0119040233ND
2019-04-0119040234ND
2019-04-0119040235ND
2019-04-0119040236ND
2019-04-0119040237ND
2019-07-0119070378ND
2019-07-0119070379ND
2019-07-0119070380ND
2019-07-0119070381ND
2019-07-0119070386ND
2019-07-0119070387ND
2019-07-0119070388ND
2019-07-0119070385ND
2019-07-0119070384ND
2019-07-0119070383ND
2019-07-0119070382ND