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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Vernon Village Inc.

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

 

54

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND90ND
2016ND90ND
2017ND90ND
2018ND90ND
2019ND90ND

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
2014-01-14BF98921VOC1ND
2014-01-14BF98920VOC1ND
2014-04-08BG29367VOC1ND
2014-04-08BG29366VOC1ND
2014-07-08BG70383TTHMND
2014-07-08BG70384VOC1ND
2014-07-08BG70385VOC1ND
2014-10-14BH27109VOC1ND
2014-10-14BH27110VOC1ND
2015-01-23BH66663VOC1ND
2015-01-23BH66664VOC1ND
2015-04-23BJ06854VOC1ND
2015-04-23BJ06855VOC1ND
2015-07-07BJ42229VOC1ND
2015-07-07BJ42228VOC1ND
2015-07-07BJ42231TTHMND
2015-10-15BK08462VOC1ND
2015-10-15BK08463VOC1ND
2016-01-12BK51281VOC1ND
2016-01-12BK51282VOC1ND
2016-04-26BN19515VOC1ND
2016-04-26BN19516VOC1ND
2016-07-18BN74894TTHMND
2016-07-18BN74891VOC1ND
2016-07-18BN74892VOC1ND
2016-12-13BX03843VOC1ND
2016-12-13BX03844VOC1ND
2017-01-26BX39326VOC1ND
2017-01-26BX39327VOC1ND
2017-04-21BY07809VOC1ND
2017-04-21BY07810VOC1ND
2017-07-27BY73667TTHMND
2017-07-27BY73664VOC1ND
2017-07-27BY73665VOC1ND
2017-10-26BZ27612VOC1ND
2017-10-26BZ27613VOC1ND
2018-01-12BZ72199VOC1ND
2018-01-12BZ72200VOC1ND
2018-04-12CA18733VOC1ND
2018-04-12CA18734VOC1ND
2018-07-25CA97190ND
2018-07-25CA97191ND
2018-07-25CA97193ND
2018-10-16CB72178ND
2018-10-16CB72179ND
2019-03-22CC73403ND
2019-03-22CC73404ND
2019-05-07CD07904ND
2019-05-07CD07905ND
2019-07-25CD64606ND
2019-08-06CD78424ND
2019-08-06CD78425ND
2019-10-28CE49240ND
2019-10-28CE49241ND