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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

City of Bellmead

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND190ND
20150.436 ppb223ND - 4.70 ppb
20160.0440 ppb251ND - 1.10 ppb
2017ND90ND
20180.143 ppb71ND - 1.000 ppb
20190.0733 ppb151ND - 1.10 ppb

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
2014-03-06AC45940ND
2014-03-06AC45953ND
2014-03-06AC45952ND
2014-03-06AC45951ND
2014-04-16AC50854ND
2014-04-16AC50816ND
2014-04-16AC50815ND
2014-04-16AC50814ND
2014-04-16AC50817ND
2014-08-12AC63069ND
2014-08-12AC63256ND
2014-08-12AC63224ND
2014-08-12AC63222ND
2014-08-12AC63254ND
2014-08-12AC63081ND
2014-11-18AC72399ND
2014-11-18AC72395ND
2014-11-18AC72388ND
2014-11-18AC72364ND
2015-02-17AC80818ND
2015-02-17AC80820ND
2015-02-17AC80816ND
2015-02-17AC80814ND
2015-02-17AC80808ND
2015-02-17AC80806ND
2015-02-17AC80807ND
2015-02-17AC80810ND
2015-05-13AC918223.80 ppb
2015-05-13AC918231.10 ppb
2015-05-13AC91821ND
2015-05-13AC91824ND
2015-05-13AC91879ND
2015-05-13AC918754.70 ppb
2015-07-27AD01041ND
2015-07-27AD01042ND
2015-07-27AD01039ND
2015-07-27AD01040ND
2015-10-01AD09258ND
2015-10-01AD09257ND
2015-10-01AD09256ND
2015-10-01AD09259ND
2016-01-14AD18291ND
2016-01-14AD18277ND
2016-01-14AD18285ND
2016-01-14AD18184ND
2016-01-14AD18188ND
2016-01-14AD18182ND
2016-01-14AD18183ND
2016-04-11AD32532ND
2016-04-11AD32517ND
2016-04-11AD325311.10 ppb
2016-04-11AD32516ND
2016-04-11AD32582ND
2016-04-11AD32584ND
2016-07-13AD44067ND
2016-07-13AD44065ND
2016-07-13AD44062ND
2016-07-13AD44072ND
2016-07-13AD44122ND
2016-07-13AD44124ND
2016-10-11AD53183ND
2016-10-11AD53181ND
2016-10-11AD53133ND
2016-10-11AD53129ND
2016-10-11AD53134ND
2016-10-11AD53127ND
2017-02-06AD69198ND
2017-02-06AD69200ND
2017-02-06AD69204ND
2017-02-06AD69202ND
2017-04-04AD78568ND
2017-04-04AD78566ND
2017-04-04AD78564ND
2017-08-14AD92822ND
2017-08-14AD92825ND
2018-02-13AE135621.000 ppb
2018-02-13AE13560ND
2018-02-13AE13572ND
2018-02-13AE13558ND
2018-05-02AE24748ND
2018-05-02AE24775ND
2018-05-02AE24825ND
2019-05-21AE67330ND
2019-05-21AE67390ND
2019-05-21AE67392ND
2019-05-21AE673881.10 ppb
2019-05-21AE67380ND
2019-05-21AE67331ND
2019-06-10AE69720ND
2019-07-24AE75714ND
2019-07-24AE75765ND
2019-07-24AE75763ND
2019-07-24AE75764ND
2019-10-17AE86885ND
2019-10-17AE86884ND
2019-10-17AE86881ND
2019-10-17AE86886ND