Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

City of Vernon

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.20 ppb32ND - 2.20 ppb
20150.703 ppb31ND - 2.11 ppb
2016ND30ND
20170.410 ppb31ND - 1.23 ppb
20180.823 ppb31ND - 2.47 ppb
2019ND30ND

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
2014-03-11Q1407813002ND
2014-05-19Q14166680032.20 ppb
2014-05-19Q14166680021.40 ppb
2015-02-10Q1505413012ND
2015-06-09Q15211380022.11 ppb
2015-06-09Q1521138001ND
2016-02-03Q1604929002ND
2016-08-01Q1631599001ND
2016-08-01Q1631599002ND
2017-01-31Q1704172002ND
2017-08-08Q17335920031.23 ppb
2017-08-08Q1733592002ND
2018-02-13Q1806086002ND
2018-06-20Q18247470032.47 ppb
2018-06-20Q1824747001ND
2019-01-30Q1904677002ND
2019-05-15Q1926031002ND
2019-05-15Q1926031003ND