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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Signal Hill - City, 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.

 

73

Samples

0

Samples exceeding legal limit (MCL)

56

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.39 ppb108ND - 4.10 ppb
20132.30 ppb1412ND - 3.10 ppb
20142.69 ppb1412ND - 3.60 ppb
20152.06 ppb1412ND - 3.10 ppb
2016ND20ND
20170.959 ppb1912ND - 2.10 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
2012-04-232706-006-0715ND
2012-08-133761-801-11143.20 ppb
2012-08-133761-802-09154.10 ppb
2012-08-133761-803-11233.10 ppb
2012-08-133761-800-09083.60 ppb
2012-10-162706-005-0930ND
2012-11-143761-801-09002.30 ppb
2012-11-143761-800-10302.70 ppb
2012-11-143761-802-09102.50 ppb
2012-11-143761-803-10202.40 ppb
2013-02-123761-801-08402.60 ppb
2013-02-123761-802-08002.40 ppb
2013-02-123761-803-08202.60 ppb
2013-02-123761-800-08302.60 ppb
2013-04-232706-006-0710ND
2013-08-203761-802-10382.30 ppb
2013-08-203761-803-09302.20 ppb
2013-08-203761-800-11112.50 ppb
2013-08-203761-801-10552.80 ppb
2013-10-222706-005-0745ND
2013-11-183761-801-11303.10 ppb
2013-11-183761-802-10553.00 ppb
2013-11-183761-802-11033.00 ppb
2013-11-183761-800-11203.10 ppb
2014-02-103761-801-08403.00 ppb
2014-02-103761-800-09503.10 ppb
2014-02-103761-802-10002.40 ppb
2014-02-103761-803-10053.60 ppb
2014-04-219588-006-1035ND
2014-05-193761-800-10202.80 ppb
2014-05-193761-801-10353.10 ppb
2014-05-193761-802-10253.10 ppb
2014-05-193761-803-10303.10 ppb
2014-08-183761-800-11173.20 ppb
2014-08-183761-803-12013.40 ppb
2014-08-183761-801-11463.40 ppb
2014-08-183761-802-12123.40 ppb
2014-10-239588-005-0940ND
2015-02-094790-800-12462.20 ppb
2015-02-094790-803-10092.30 ppb
2015-02-094790-801-12032.20 ppb
2015-02-094790-802-07562.10 ppb
2015-04-219588-006-0943ND
2015-05-184790-803-10592.50 ppb
2015-05-184790-800-11522.50 ppb
2015-05-184790-802-11102.40 ppb
2015-05-184790-801-10472.30 ppb
2015-08-174790-803-00002.40 ppb
2015-08-174790-802-00002.60 ppb
2015-08-174790-801-00002.30 ppb
2015-08-244790-800-11293.10 ppb
2015-10-229588-005-1005ND
2016-04-209588-006-1000ND
2016-10-209588-005-1110ND
2017-02-134790-802-10412.00 ppb
2017-02-134790-800-12512.00 ppb
2017-02-134790-803-10302.10 ppb
2017-02-134790-801-12372.00 ppb
2017-05-224790-801-11170.970 ppb
2017-05-224790-803-10430.840 ppb
2017-05-224790-800-11050.980 ppb
2017-05-224790-802-10520.570 ppb
2017-07-054790-022-1052ND
2017-07-054790-017-1047ND
2017-07-054790-021-1049ND
2017-08-014790-022-1322ND
2017-08-014790-017-1317ND
2017-08-014790-021-1320ND
2017-10-199588-005-1023ND
2017-11-201805-802-11452.03 ppb
2017-11-201805-800-11521.66 ppb
2017-11-201805-801-12101.42 ppb
2017-11-201805-803-10201.66 ppb