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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Alexandria

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

 

156

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.658 ppb12120.600 ppb - 0.800 ppb
20150.288 ppb167ND - 0.800 ppb
20160.338 ppb3216ND - 1.000 ppb
20170.0875 ppb325ND - 0.600 ppb
2018ND320ND
20190.106 ppb326ND - 0.600 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
2014-08-1326553501THM0.800 ppb
2014-08-1326553301THM0.700 ppb
2014-08-1326553101THM0.600 ppb
2014-08-1326553201THM0.600 ppb
2014-11-1127471901THM0.700 ppb
2014-11-1127472001THM0.700 ppb
2014-11-1127472101THM0.700 ppb
2014-11-1127471701THM0.700 ppb
2014-11-1127472301THM0.600 ppb
2014-11-1127472201THM0.600 ppb
2014-11-1127472401THM0.600 ppb
2014-11-1127471801THM0.600 ppb
2015-08-12460274-AMERICAN0.800 ppb
2015-08-12460274-AMERICAN0.700 ppb
2015-08-12460274-AMERICAN0.700 ppb
2015-08-12460274-AMERICAN0.700 ppb
2015-08-12460274-AMERICAN0.600 ppb
2015-08-12460274-AMERICAN0.500 ppb
2015-08-12460274-AMERICANND
2015-08-12460274-AMERICANND
2015-11-1000001_EXP-AMERIC0.600 ppb
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2015-11-1000001_EXP-AMERICND
2016-02-0931203901THMND
2016-02-0931204001THMND
2016-02-0931204101THMND
2016-02-0931204201THMND
2016-02-0931204301THMND
2016-02-0931204401THMND
2016-02-0931204501THMND
2016-02-0931204601THMND
2016-05-0931993501THM0.600 ppb
2016-05-0931993601THMND
2016-05-0931993201THMND
2016-05-0931993701THMND
2016-05-0931993801THMND
2016-05-0931993901THMND
2016-05-0931993301THMND
2016-05-0931993401THMND
2016-08-1533037001-THM0.700 ppb
2016-08-1533037101-THM0.700 ppb
2016-08-1533037401-THM0.600 ppb
2016-08-1533037501-THM0.600 ppb
2016-08-1533037601-THM0.600 ppb
2016-08-1533037201-THM0.600 ppb
2016-08-1533037301-THM0.500 ppb
2016-08-1533036901-THM0.500 ppb
2016-11-1633709301-THM1.000 ppb
2016-11-1633709801-THM0.900 ppb
2016-11-1633709501-THM0.800 ppb
2016-11-1633709601-THM0.800 ppb
2016-11-1633709401-THM0.700 ppb
2016-11-1633709701-THM0.700 ppb
2016-11-1633710001-THM0.500 ppb
2016-11-1633709901-THMND
2017-02-1334624501-THMND
2017-02-1334624601-THMND
2017-02-1334624701-THMND
2017-02-1334624801-THMND
2017-02-1334624901-THMND
2017-02-1334625001-THMND
2017-02-1334625101-THMND
2017-02-1334625201-THMND
2017-05-1035405701-THMND
2017-05-1035405901-THMND
2017-05-1035406101-THMND
2017-05-1035406301-THMND
2017-05-1035406501-THMND
2017-05-1035406701-THMND
2017-05-1035406901-THMND
2017-05-1035407101-THMND
2017-08-1436594601-THM0.600 ppb
2017-08-1436594801-THM0.600 ppb
2017-08-1436594901-THM0.600 ppb
2017-08-1436594501-THM0.500 ppb
2017-08-1436594401-THMND
2017-08-1436594701-THMND
2017-08-1436595001-THMND
2017-08-1436595101-THMND
2017-11-1337617001-THM0.500 ppb
2017-11-1337616401-THMND
2017-11-1337616501-THMND
2017-11-1337616601-THMND
2017-11-1337616701-THMND
2017-11-1337616801-THMND
2017-11-1337616901-THMND
2017-11-1337617101-THMND
2018-02-1238588401-THMND
2018-02-1238588501-THMND
2018-02-1238588601-THMND
2018-02-1238588701-THMND
2018-02-1238588801-THMND
2018-02-1238588901-THMND
2018-02-1238589001-THMND
2018-02-1238589101-THMND
2018-05-1439297401-THMND
2018-05-1439297501-THMND
2018-05-1439297601-THMND
2018-05-1439297701-THMND
2018-05-1439297801-THMND
2018-05-1439297901-THMND
2018-05-1439298001-THMND
2018-05-1439298101-THMND
2018-08-1340583301-THMND
2018-08-1340583401-THMND
2018-08-1340583501-THMND
2018-08-1340583601-THMND
2018-08-1340583701-THMND
2018-08-1340583801-THMND
2018-08-1340583901-THMND
2018-08-1340584001-THMND
2018-11-1241794301-THMND
2018-11-1241794401-THMND
2018-11-1241794501-THMND
2018-11-1241794601-THMND
2018-11-1241794701-THMND
2018-11-1241794801-THMND
2018-11-1241794901-THMND
2018-11-1241795001-THMND
2019-02-1142939401-THMND
2019-02-1142939501-THMND
2019-02-1142939601-THMND
2019-02-1142939701-THMND
2019-02-1142939801-THMND
2019-02-1142939901-THMND
2019-02-1142940001-THMND
2019-02-1142940101-THMND
2019-05-1443902201-THMND
2019-05-1443902301-THMND
2019-05-1443902401-THMND
2019-05-1443902501-THMND
2019-05-1443902601-THMND
2019-05-1443902701-THMND
2019-05-1443902801-THMND
2019-05-1443902901-THMND
2019-08-1245559001-THM0.600 ppb
2019-08-1245559101-THM0.500 ppb
2019-08-1245559201-THM0.600 ppb
2019-08-1245559301-THMND
2019-08-1245559401-THM0.600 ppb
2019-08-1245559501-THMND
2019-08-1245559601-THM0.600 ppb
2019-08-1245559701-THM0.500 ppb
2019-11-1147229901-THMND
2019-11-1147230001-THMND
2019-11-1147230101-THMND
2019-11-1147230201-THMND
2019-11-1147230301-THMND
2019-11-1147230401-THMND
2019-11-1147230501-THMND
2019-11-1147230601-THMND