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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Sierra Madre Water Department

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)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND60ND
2014ND50ND
20150.517 ppb61ND - 3.10 ppb
20160.547 ppb175ND - 3.10 ppb
20170.762 ppb219ND - 3.10 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
2012-05-079588-004-0855ND
2012-05-079588-003-0830ND
2012-05-079588-007-0915ND
2012-05-079588-006-0935ND
2012-05-079588-005-0840ND
2013-05-219588-007-1000ND
2013-05-219588-004-0925ND
2013-05-219588-006-0940ND
2013-05-219588-005-0910ND
2013-06-263761-003-0800ND
2013-06-279588-003-0805ND
2014-05-129588-005-1105ND
2014-05-129588-003-1030ND
2014-05-129588-004-1045ND
2014-05-129588-006-1055ND
2014-05-129588-007-1125ND
2015-02-023761-010-08003.10 ppb
2015-05-139588-003-1115ND
2015-05-139588-007-0840ND
2015-05-139588-006-1020ND
2015-05-139588-005-0940ND
2015-05-139588-004-1000ND
2016-05-023761-803-0800ND
2016-05-023761-802-08001.10 ppb
2016-05-023761-801-0800ND
2016-05-023761-800-08001.70 ppb
2016-05-039588-003-0815ND
2016-05-039588-004-0845ND
2016-05-039588-005-0830ND
2016-05-039588-006-0900ND
2016-05-039588-007-0920ND
2016-08-013761-801-0800ND
2016-08-013761-802-0800ND
2016-08-013761-800-08002.10 ppb
2016-08-013761-803-0800ND
2016-11-073761-801-08001.30 ppb
2016-11-073761-800-08003.10 ppb
2016-11-073761-803-0800ND
2016-11-073761-802-0800ND
2017-02-063761-802-0800ND
2017-02-063761-801-08001.000 ppb
2017-02-063761-800-08002.70 ppb
2017-02-063761-803-0800ND
2017-05-013761-800-08003.10 ppb
2017-05-013761-803-0800ND
2017-05-013761-802-08001.10 ppb
2017-05-013761-801-08001.60 ppb
2017-05-039588-003-1030ND
2017-05-039588-007-1010ND
2017-05-039588-006-0940ND
2017-05-039588-005-0930ND
2017-05-039588-004-1045ND
2017-08-013761-803-0800ND
2017-08-013761-800-08002.10 ppb
2017-08-013761-802-08001.30 ppb
2017-08-013761-801-0800ND
2017-11-073761-802-08001.10 ppb
2017-11-073761-801-0800ND
2017-11-073761-800-08002.00 ppb
2017-11-073761-803-0800ND