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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Golden State Water Company - Tanglewood

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.

MORE ABOUT THIS CONTAMINANT

 

54

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.273 ppb112ND - 1.80 ppb
2015ND90ND
2016ND90ND
2017ND80ND
2018ND90ND
2019ND80ND

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
2014-01-082706-009-0915ND
2014-01-222706-008-08051.20 ppb
2014-01-222706-007-0755ND
2014-04-022706-009-1015ND
2014-04-022706-008-0740ND
2014-04-022706-007-07501.80 ppb
2014-07-012706-008-0930ND
2014-07-012706-007-0945ND
2014-07-302706-009-1030ND
2014-10-082706-008-0925ND
2014-10-105867-007-1120ND
2015-01-062706-007-1605ND
2015-01-062706-008-1550ND
2015-01-212706-009-0800ND
2015-04-012706-007-0815ND
2015-04-012706-008-0805ND
2015-07-222706-007-0815ND
2015-07-222706-008-0750ND
2015-10-072706-007-0840ND
2015-10-072706-008-0910ND
2016-01-192706-007-1420ND
2016-01-192706-008-1405ND
2016-04-272706-008-0820ND
2016-04-272706-007-0815ND
2016-07-062706-008-0800ND
2016-07-062706-007-0810ND
2016-08-102706-009-0805ND
2016-10-052706-008-0815ND
2016-10-052706-007-0805ND
2017-01-179590-008-1115ND
2017-01-179590-007-1100ND
2017-04-049590-008-1155ND
2017-04-049590-007-1140ND
2017-07-119590-008-1020ND
2017-07-119590-007-1030ND
2017-10-109590-008-1145ND
2017-10-319590-007-1100ND
2018-01-099590-008-0915ND
2018-01-099590-007-0935ND
2018-02-139590-009-1105ND
2018-04-179590-008-0825ND
2018-04-179590-007-0820ND
2018-07-179590-008-0905ND
2018-07-179590-007-0907ND
2018-10-099590-008-0945ND
2018-10-099590-007-0926ND
2019-01-089590-008-1300ND
2019-01-089590-007-1315ND
2019-04-029590-008-0835ND
2019-04-029590-007-0923ND
2019-07-029590-008-1240ND
2019-07-029590-007-1225ND
2019-10-019590-008-1205ND
2019-10-019590-007-1215ND