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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Fort Bend County Municipal Utility District 106

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

 

49

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND180ND
2019ND180ND

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
2014-04-15AC50601ND
2015-07-16AC99913ND
2015-07-16AC99916ND
2015-07-16AC99948ND
2015-07-16AC99958ND
2016-02-17AD23971ND
2016-02-17AD23977ND
2016-07-12AD43807ND
2016-07-12AD43805ND
2017-02-21AD71276ND
2017-07-11AD88821ND
2017-07-11AD88822ND
2017-10-17AE01097ND
2018-02-05AE12183ND
2018-02-05AE12167ND
2018-02-05AE12179ND
2018-02-05AE12185ND
2018-02-05AE12241ND
2018-04-10AE21868ND
2018-04-10AE21855ND
2018-04-10AE21874ND
2018-04-10AE21876ND
2018-04-10AE21898ND
2018-08-14AE36841ND
2018-08-14AE36843ND
2018-08-14AE36845ND
2018-08-14AE36844ND
2018-10-01AE42212ND
2018-10-01AE42206ND
2018-10-01AE42210ND
2018-10-01AE42205ND
2019-01-23AE50935ND
2019-01-23AE50927ND
2019-01-23AE50928ND
2019-01-23AE50989ND
2019-01-23AE50985ND
2019-03-08AE57797ND
2019-04-08AE61331ND
2019-04-08AE61337ND
2019-04-08AE61346ND
2019-04-08AE61363ND
2019-07-08AE73404ND
2019-07-08AE73415ND
2019-07-08AE73418ND
2019-07-08AE73414ND
2019-10-09AE86114ND
2019-10-09AE86110ND
2019-10-09AE86120ND
2019-10-09AE86100ND