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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Southgate Mobile Home Park 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.746 ppb1610ND - 1.53 ppb
2017ND160ND
20180.630 ppb1612ND - 0.960 ppb
20190.839 ppb1612ND - 2.70 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
2014-01-21AD88561ND
2014-01-21AD88557ND
2014-01-21AD88561ND
2014-01-21AD88557ND
2014-05-131300768ND
2014-05-131300769ND
2014-05-131300769ND
2014-05-131300768ND
2014-08-111325186ND
2014-08-111325187ND
2014-08-111325187ND
2014-08-111325186ND
2014-11-121349681ND
2014-11-121349682ND
2014-11-121349682ND
2014-11-121349681ND
2015-02-171373161ND
2015-02-171373162ND
2015-02-171373162ND
2015-02-171373161ND
2015-05-181396184ND
2015-05-181396185ND
2015-05-181396185ND
2015-05-181396184ND
2015-08-241421814ND
2015-08-241421813ND
2015-08-241421814ND
2015-08-241421813ND
2015-11-181445139ND
2015-11-181445140ND
2015-11-181445140ND
2015-11-181445139ND
2016-02-221469938ND
2016-02-221469939ND
2016-02-221469939ND
2016-02-221469938ND
2016-05-3014953500.330 ppb
2016-05-301495349ND
2016-05-3014953500.330 ppb
2016-05-301495349ND
2016-08-2215188531.23 ppb
2016-08-2215188541.35 ppb
2016-08-2215188541.35 ppb
2016-08-2215188531.23 ppb
2016-11-2815440121.53 ppb
2016-11-2815440131.53 ppb
2016-11-2815440131.53 ppb
2016-11-2815440121.53 ppb
2017-02-0935294581008ND
2017-02-0935294581007ND
2017-02-0935294581007ND
2017-02-0935294581008ND
2017-05-1135312027013ND
2017-05-1135312027013ND
2017-05-1135312027014ND
2017-05-1135312027014ND
2017-08-0935329950034ND
2017-08-0935329950035ND
2017-08-0935329950034ND
2017-08-0935329950035ND
2017-11-0335347176002ND
2017-11-0335347176001ND
2017-11-0335347176001ND
2017-11-0335347176002ND
2018-02-15353751030020.960 ppb
2018-02-15353751030010.940 ppb
2018-02-15353751030020.960 ppb
2018-02-15353751030010.940 ppb
2018-05-24353946050020.690 ppb
2018-05-24353946050020.690 ppb
2018-05-24353946050010.880 ppb
2018-05-24353946050010.880 ppb
2018-08-20354133460020.900 ppb
2018-08-20354133460010.670 ppb
2018-08-20354133460010.670 ppb
2018-08-20354133460020.900 ppb
2018-11-1635432196001ND
2018-11-1635432196002ND
2018-11-1635432196001ND
2018-11-1635432196002ND
2019-02-14354490820020.660 ppb
2019-02-14354490820011.60 ppb
2019-02-14354490820011.60 ppb
2019-02-14354490820020.660 ppb
2019-05-01354657680020.440 ppb
2019-05-01354657680020.440 ppb
2019-05-01354657680010.540 ppb
2019-05-01354657680010.540 ppb
2019-08-0135487207002ND
2019-08-0135487207001ND
2019-08-0135487207001ND
2019-08-0135487207002ND
2019-11-05355105250010.770 ppb
2019-11-05355105250022.70 ppb
2019-11-05355105250010.770 ppb
2019-11-05355105250022.70 ppb