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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Concord 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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND40ND
2014ND40ND
2015ND50ND
2016ND210ND
2017ND200ND

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
2012-08-16113258.01ND
2012-10-23115341.01ND
2012-10-23115341.02ND
2012-10-23115341.03ND
2012-10-23115341.04ND
2013-10-23125755.04ND
2013-10-23125755.03ND
2013-10-23125755.02ND
2013-10-23125755.01ND
2014-10-31137495.01ND
2014-10-31137495.02ND
2014-10-31137495.03ND
2014-10-31137495.04ND
2015-08-07146612.01ND
2015-10-15149110.04ND
2015-10-15149110.03ND
2015-10-15149110.02ND
2015-10-15149110.01ND
2016-02-05B600577001ND
2016-02-05B600577002ND
2016-02-05B600577003ND
2016-02-05B600577004ND
2016-05-04B602483004ND
2016-05-04B602483003ND
2016-05-04B602483002ND
2016-05-04B602483001ND
2016-08-05B607011004ND
2016-08-05B607011003ND
2016-08-05B607011002ND
2016-08-05B607011001ND
2016-08-05159131.01ND
2016-10-07161374.02ND
2016-10-07161374.03ND
2016-10-07161374.04ND
2016-10-07161374.05ND
2016-11-04B610074004ND
2016-11-04B610074003ND
2016-11-04B610074002ND
2016-11-04B610074001ND
2017-02-03B700543001ND
2017-02-03B700543002ND
2017-02-03B700543003ND
2017-02-03B700543004ND
2017-05-05B702263004ND
2017-05-05B702263003ND
2017-05-05B702263002ND
2017-05-05B702263001ND
2017-08-04B706613001ND
2017-08-04B706613002ND
2017-08-04B706613003ND
2017-08-04B706613004ND
2017-11-02B709647004ND
2017-11-02B709647003ND
2017-11-02B709647002ND
2017-11-02B709647001ND
2017-11-13175839.02ND
2017-11-13175839.03ND
2017-11-13175839.04ND
2017-11-13175839.05ND