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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

California Water Service Company-Lancaster

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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND10ND
20140.282 ppb63ND - 0.610 ppb
20150.335 ppb105ND - 0.790 ppb
20161.93 ppb106ND - 16.4 ppb
20170.300 ppb104ND - 1.000 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
2012-12-185810-005-1220ND
2012-12-185810-001-1230ND
2013-06-195701-005-1030ND
2014-05-135701-801-09420.580 ppb
2014-05-135701-800-1009ND
2014-05-205701-001-1000ND
2014-06-245701-005-1112ND
2014-07-235701-801-10110.610 ppb
2014-07-235701-800-09530.500 ppb
2015-02-035701-800-13070.720 ppb
2015-02-035701-801-12380.610 ppb
2015-05-125701-801-08090.620 ppb
2015-05-125701-800-0808ND
2015-05-195701-001-0937ND
2015-06-165701-005-1347ND
2015-08-115701-800-09490.610 ppb
2015-08-115701-801-09500.790 ppb
2015-11-095810-801-1641ND
2015-11-095810-800-1650ND
2016-02-095701-801-09080.680 ppb
2016-02-095701-800-09080.540 ppb
2016-05-105701-800-0919ND
2016-05-105701-801-09190.520 ppb
2016-05-245701-001-1342ND
2016-06-285701-005-1145ND
2016-08-095701-801-09450.530 ppb
2016-08-095701-800-0945ND
2016-11-155701-801-084416.4 ppb
2016-11-155701-800-08440.650 ppb
2017-02-145701-801-09410.720 ppb
2017-02-145701-800-09400.690 ppb
2017-05-095701-801-09560.590 ppb
2017-05-095701-800-0956ND
2017-05-095701-001-1025ND
2017-06-205701-005-1501ND
2017-08-155810-801-1452ND
2017-08-155810-800-1423ND
2017-11-135810-801-15001.000 ppb
2017-11-135810-800-1406ND