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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Lakeport

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.655 ppb82ND - 2.78 ppb
20150.171 ppb81ND - 1.37 ppb
2016ND80ND
2017ND80ND
2018ND80ND
20192.81 ppb81ND - 22.5 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
2014-01-161610-008-0920ND
2014-01-161610-007-0938ND
2014-04-231610-008-0915ND
2014-04-231610-007-0930ND
2014-07-101610-008-1010ND
2014-07-101610-007-10272.46 ppb
2014-10-061610-008-0850ND
2014-10-061610-007-09052.78 ppb
2015-01-131610-007-0900ND
2015-01-131610-008-0845ND
2015-05-061610-007-09341.37 ppb
2015-05-061610-008-0920ND
2015-07-291610-007-0845ND
2015-07-291610-008-0820ND
2015-10-071610-007-0946ND
2015-10-071610-008-0915ND
2016-01-211610-007-0900ND
2016-01-211610-008-0830ND
2016-04-111610-007-0957ND
2016-04-111610-008-0940ND
2016-07-111610-007-1013ND
2016-07-111610-008-0940ND
2016-10-201610-007-0930ND
2016-10-201610-008-0910ND
2017-01-181610-008-0830ND
2017-01-181610-007-0805ND
2017-04-261610-008-1010ND
2017-04-261610-007-0940ND
2017-07-311610-008-0845ND
2017-07-311610-007-0830ND
2017-10-251610-008-0945ND
2017-10-251610-007-1015ND
2018-01-241610-007-0825ND
2018-01-241610-008-0840ND
2018-04-161610-007-1030ND
2018-04-161610-008-1100ND
2018-07-251610-008-0950ND
2018-07-251610-007-0935ND
2018-10-241610-008-1030ND
2018-10-241610-007-1045ND
2019-01-221610-008-1035ND
2019-01-221610-007-1050ND
2019-04-081610-008-1020ND
2019-04-081610-007-1045ND
2019-07-101610-008-1100ND
2019-07-101610-007-1125ND
2019-10-211610-008-094022.5 ppb
2019-10-211610-007-1025ND