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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

Beverly Hills Water Department

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.

 

104

Samples

0

Samples exceeding legal limit (MCL)

84

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.86 ppb84ND - 9.10 ppb
20134.09 ppb1915ND - 16.0 ppb
20149.14 ppb2016ND - 17.1 ppb
20159.73 ppb2117ND - 15.4 ppb
20166.14 ppb2016ND - 14.2 ppb
20173.71 ppb16160.841 ppb - 16.1 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
2012-10-239469-800-03459.10 ppb
2012-10-239469-801-02502.55 ppb
2012-10-239469-802-03002.15 ppb
2012-10-239469-803-02001.11 ppb
2012-11-089469-012-0440ND
2012-11-089469-014-0415ND
2012-11-089469-015-0345ND
2012-12-319469-013-1000ND
2013-01-219469-800-02091.86 ppb
2013-01-219469-801-05250.650 ppb
2013-01-219469-802-01350.520 ppb
2013-01-219469-803-00251.04 ppb
2013-02-209469-800-02252.77 ppb
2013-02-209469-802-02450.730 ppb
2013-02-209469-803-04000.740 ppb
2013-04-159469-800-10512.08 ppb
2013-04-159469-801-11208.95 ppb
2013-04-159469-802-10101.54 ppb
2013-04-159469-803-07502.00 ppb
2013-07-179469-800-025414.3 ppb
2013-07-179469-801-020812.3 ppb
2013-07-179469-802-022712.2 ppb
2013-07-179469-803-040016.0 ppb
2013-11-079469-012-0115ND
2013-11-079469-013-0045ND
2013-11-079469-014-0010ND
2013-11-079469-015-0245ND
2014-02-199469-800-01558.28 ppb
2014-02-199469-801-02459.05 ppb
2014-02-199469-802-01058.73 ppb
2014-02-199469-803-03256.68 ppb
2014-04-109469-800-030510.3 ppb
2014-04-109469-801-02387.51 ppb
2014-04-109469-802-02539.18 ppb
2014-04-109469-803-01334.70 ppb
2014-07-179469-800-013015.3 ppb
2014-07-179469-801-015613.2 ppb
2014-07-179469-802-014515.4 ppb
2014-07-179469-803-022516.0 ppb
2014-10-219469-800-094514.7 ppb
2014-10-219469-801-122211.4 ppb
2014-10-219469-802-102817.1 ppb
2014-10-219469-803-061915.3 ppb
2014-11-139469-012-0850ND
2014-11-139469-013-0920ND
2014-11-139469-014-0945ND
2014-11-139469-015-0812ND
2015-02-179469-800-080110.1 ppb
2015-02-179469-801-06558.14 ppb
2015-02-179469-802-07197.98 ppb
2015-02-179469-803-05479.52 ppb
2015-05-049588-800-145913.0 ppb
2015-05-049588-801-143715.0 ppb
2015-05-049588-802-144513.0 ppb
2015-05-049588-803-140011.0 ppb
2015-07-079469-800-105411.9 ppb
2015-07-079469-801-093914.4 ppb
2015-07-139469-801-093914.4 ppb
2015-07-139469-802-095813.7 ppb
2015-07-139469-803-053015.4 ppb
2015-10-129469-800-072613.9 ppb
2015-10-129469-801-09068.39 ppb
2015-10-129469-802-065511.1 ppb
2015-10-129469-803-044513.4 ppb
2015-10-139469-012-0725ND
2015-10-139469-013-0747ND
2015-10-139469-014-0808ND
2015-10-139469-015-0840ND
2016-01-119469-800-07599.21 ppb
2016-01-119469-801-09419.04 ppb
2016-01-119469-802-07288.10 ppb
2016-01-119469-803-05207.57 ppb
2016-04-119469-800-02395.99 ppb
2016-04-119469-801-04018.00 ppb
2016-04-119469-802-02059.07 ppb
2016-04-119469-803-00127.56 ppb
2016-07-119469-800-01498.31 ppb
2016-07-119469-801-00243.09 ppb
2016-07-119469-802-02383.18 ppb
2016-07-119469-803-03503.62 ppb
2016-10-109469-800-02138.16 ppb
2016-10-109469-801-03409.10 ppb
2016-10-109469-802-031014.2 ppb
2016-10-109469-803-00138.68 ppb
2016-11-219469-012-0924ND
2016-11-219469-013-0947ND
2016-11-219469-014-1002ND
2016-11-219469-015-1019ND
2017-01-109469-800-08134.68 ppb
2017-01-109469-801-09335.18 ppb
2017-01-109469-802-07035.80 ppb
2017-01-109469-803-08575.32 ppb
2017-04-109469-800-101116.1 ppb
2017-04-109469-801-11302.03 ppb
2017-04-109469-802-10242.10 ppb
2017-04-109469-803-12152.24 ppb
2017-07-109469-800-10001.74 ppb
2017-07-109469-802-11400.841 ppb
2017-07-109469-803-12591.04 ppb
2017-10-099469-800-01043.73 ppb
2017-10-099469-801-03551.53 ppb
2017-10-099469-802-01342.95 ppb
2017-10-099469-803-03102.23 ppb
2017-10-129469-014-08051.86 ppb