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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Los Angeles County WW District 40 Reg 38 Lake Los Angeles

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

74

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20130.468 ppb62ND - 1.44 ppb
20144.64 ppb1813ND - 23.8 ppb
20158.73 ppb1811ND - 31.4 ppb
201610.1 ppb1816ND - 58.7 ppb
20175.46 ppb12121.50 ppb - 13.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2012-06-055442-008-0830ND
2012-09-065442-003-1016ND
2013-06-185442-003-0848ND
2013-06-185442-008-0901ND
2013-10-075442-803-1125ND
2013-10-075442-800-11101.44 ppb
2013-10-075442-802-1140ND
2013-10-075442-801-10501.37 ppb
2014-01-095442-803-10300.970 ppb
2014-01-095442-800-09551.40 ppb
2014-01-095442-802-10509.36 ppb
2014-01-095442-801-10151.03 ppb
2014-04-075442-801-1125ND
2014-04-075442-800-11150.760 ppb
2014-04-075442-802-11503.49 ppb
2014-04-075442-803-1140ND
2014-06-175442-008-1108ND
2014-06-175442-003-1117ND
2014-07-095442-801-09156.94 ppb
2014-07-095442-802-101015.1 ppb
2014-07-095442-803-09301.10 ppb
2014-07-105442-800-11454.60 ppb
2014-10-085442-800-10393.40 ppb
2014-10-085442-801-0934ND
2014-10-085442-802-100223.8 ppb
2014-10-085442-803-094211.6 ppb
2015-01-145442-803-1100ND
2015-01-145442-802-1115ND
2015-01-145442-800-10351.37 ppb
2015-01-145442-801-1045ND
2015-04-085442-801-0925ND
2015-04-085442-802-0945ND
2015-04-085442-800-09551.73 ppb
2015-04-085442-803-09351.01 ppb
2015-06-225442-008-0915ND
2015-06-225442-003-0915ND
2015-07-085442-802-104224.7 ppb
2015-07-085442-801-101617.2 ppb
2015-07-085442-803-102714.7 ppb
2015-07-085442-800-110631.4 ppb
2015-10-075442-803-120010.4 ppb
2015-10-075442-801-113015.9 ppb
2015-10-075442-800-114519.2 ppb
2015-10-075442-802-121519.6 ppb
2016-01-115442-803-12253.25 ppb
2016-01-115442-800-12325.50 ppb
2016-01-115442-802-12452.37 ppb
2016-01-115442-801-12152.94 ppb
2016-04-145442-803-09069.84 ppb
2016-04-145442-800-083210.3 ppb
2016-04-145442-802-09147.05 ppb
2016-04-145442-801-08559.85 ppb
2016-05-125442-003-1055ND
2016-05-125442-008-0950ND
2016-07-145442-800-12203.82 ppb
2016-07-145442-802-113020.8 ppb
2016-07-145442-803-11551.34 ppb
2016-07-145442-801-12053.17 ppb
2016-10-135442-800-114515.7 ppb
2016-10-135442-803-113315.8 ppb
2016-10-135442-802-122158.7 ppb
2016-10-135442-801-115912.2 ppb
2017-01-095442-800-14227.47 ppb
2017-01-095442-803-14095.04 ppb
2017-01-095442-801-145713.5 ppb
2017-01-095442-802-14504.80 ppb
2017-04-209590-800-10305.60 ppb
2017-04-209590-801-10555.10 ppb
2017-04-209590-803-11123.10 ppb
2017-04-209590-802-11289.60 ppb
2017-07-179588-801-09432.30 ppb
2017-07-179588-803-09531.50 ppb
2017-07-179588-800-10475.70 ppb
2017-07-179588-802-11231.80 ppb