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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Lyme Academy Apartments LLC

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.588 ppb82ND - 4.00 ppb
2015ND80ND
20160.0788 ppb81ND - 0.630 ppb
2017ND80ND
2018ND80ND
2019ND80ND

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
2014-03-26BG23521VOC1ND
2014-03-26BG23520VOC14.00 ppb
2014-06-24BG64509VOC10.700 ppb
2014-06-24BG64508VOC1ND
2014-09-26BH20023VOC1ND
2014-09-26BH20024VOC1ND
2014-10-16BH28467VOC1ND
2014-10-16BH28468VOC1ND
2015-01-15BH63717VOC1ND
2015-01-15BH63718VOC1ND
2015-04-30BJ10117VOC1ND
2015-04-30BJ10118VOC1ND
2015-07-10BJ44676VOC1ND
2015-07-10BJ44675VOC1ND
2015-10-19BK10275VOC1ND
2015-10-19BK10276VOC1ND
2016-01-28BK58725VOC1ND
2016-01-28BK58726VOC1ND
2016-04-14BN13921VOC1ND
2016-04-14BN13922VOC1ND
2016-07-14BN72967VOC1ND
2016-07-14BN72968VOC10.630 ppb
2016-10-06BV39864VOC1ND
2016-10-06BV39865VOC1ND
2017-01-05BX16401VOC1ND
2017-01-05BX16402VOC1ND
2017-04-20BY07563VOC1ND
2017-04-20BY07564VOC1ND
2017-07-06BY52781VOC1ND
2017-07-06BY52782VOC1ND
2017-10-05BZ15701VOC1ND
2017-10-05BZ15702VOC1ND
2018-01-11BZ71421VOC1ND
2018-01-11BZ71422VOC1ND
2018-04-05CA14772VOC1ND
2018-04-05CA14773VOC1ND
2018-07-16CA90748ND
2018-07-16CA90749ND
2018-10-11CB69892ND
2018-10-11CB69893ND
2019-02-05CC40790ND
2019-02-05CC40791ND
2019-04-08CC90374ND
2019-04-08CC90375ND
2019-07-22CD62263ND
2019-07-22CD62264ND
2019-10-17CE42740ND
2019-10-17CE42741ND