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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Suburban Water Systems-covina Knolls

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20127.38 ppb127ND - 22.0 ppb
20138.83 ppb128ND - 40.0 ppb
20142.68 ppb1210ND - 10.00 ppb
20151.49 ppb84ND - 3.20 ppb
20165.21 ppb881.90 ppb - 12.0 ppb
20171.26 ppb82ND - 5.20 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
2012-04-249588-801-0915ND
2012-04-249588-800-0900ND
2012-07-239588-801-0840ND
2012-07-239588-800-0825ND
2012-10-229588-800-085022.0 ppb
2012-10-229588-801-090021.0 ppb
2012-11-129588-800-092013.0 ppb
2012-11-129588-801-09098.60 ppb
2012-11-199588-800-110711.0 ppb
2012-11-199588-801-105211.0 ppb
2012-11-269588-800-1118ND
2012-11-269588-801-10451.90 ppb
2013-01-289588-800-08355.20 ppb
2013-01-289588-801-08156.80 ppb
2013-04-229588-800-0915ND
2013-04-229588-801-0930ND
2013-07-239588-800-0905ND
2013-07-239588-801-0925ND
2013-10-229588-800-091037.0 ppb
2013-10-229588-801-092040.0 ppb
2013-11-189588-800-11543.60 ppb
2013-11-189588-801-11383.80 ppb
2013-12-039588-801-10344.90 ppb
2013-12-039588-800-10234.70 ppb
2014-01-229588-800-09052.40 ppb
2014-01-229588-801-09302.30 ppb
2014-04-219588-800-08302.80 ppb
2014-04-219588-801-08402.50 ppb
2014-07-229588-800-0850ND
2014-07-229588-801-0900ND
2014-10-139588-800-110010.00 ppb
2014-10-139588-801-11153.50 ppb
2014-10-229588-801-09001.40 ppb
2014-10-229588-800-08501.50 ppb
2014-12-109588-800-08452.50 ppb
2014-12-109588-801-08553.20 ppb
2015-01-229588-800-08452.60 ppb
2015-01-229588-801-09003.00 ppb
2015-04-219588-801-09053.10 ppb
2015-04-219588-800-08553.20 ppb
2015-07-279588-801-0900ND
2015-07-279588-800-0850ND
2015-10-229588-800-0850ND
2015-10-229588-801-0905ND
2016-01-229588-801-091512.0 ppb
2016-01-229588-800-09009.50 ppb
2016-04-219588-801-09351.90 ppb
2016-04-219588-800-09253.40 ppb
2016-07-229588-801-08305.10 ppb
2016-07-229588-800-08155.20 ppb
2016-10-249588-800-09102.10 ppb
2016-10-249588-801-09202.50 ppb
2017-01-259588-800-09004.90 ppb
2017-01-259588-801-09155.20 ppb
2017-04-219588-800-0845ND
2017-04-219588-801-0900ND
2017-07-249588-801-0830ND
2017-07-249588-800-0820ND
2017-10-239588-800-0840ND
2017-10-239588-801-0850ND