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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Alexandria Water System

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

 

60

Samples

0

Samples exceeding legal limit (MCL)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.453 ppb326ND - 4.52 ppb
20150.825 ppb42ND - 1.65 ppb
20162.08 ppb881.40 ppb - 2.70 ppb
20171.70 ppb660.800 ppb - 2.40 ppb
20180.607 ppb64ND - 1.000 ppb
20191.70 ppb42ND - 3.40 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
2014-02-0512756571.11 ppb
2014-02-051275655ND
2014-02-051275656ND
2014-02-0512756571.11 ppb
2014-02-051275658ND
2014-02-051275656ND
2014-02-051275655ND
2014-02-051275658ND
2014-05-061299041ND
2014-05-061299039ND
2014-05-061299040ND
2014-05-061299041ND
2014-05-061299042ND
2014-05-061299040ND
2014-05-061299039ND
2014-05-061299042ND
2014-08-041322733ND
2014-08-0413227344.52 ppb
2014-08-041322735ND
2014-08-041322736ND
2014-08-041322733ND
2014-08-0413227344.52 ppb
2014-08-041322735ND
2014-08-041322736ND
2014-08-1835151018001ND
2014-08-1835151018001ND
2014-08-1835151018002ND
2014-08-1835151018002ND
2014-11-041347208ND
2014-11-0413472091.62 ppb
2014-11-0413472091.62 ppb
2014-11-041347208ND
2015-08-1114181531.65 ppb
2015-08-1114181531.65 ppb
2015-11-051441992ND
2015-11-051441992ND
2016-08-11680-128769-11.40 ppb
2016-08-11680-128769-21.50 ppb
2016-08-11680-128769-21.50 ppb
2016-08-11680-128769-11.40 ppb
2016-11-08680-131994-12.70 ppb
2016-11-08680-131994-22.70 ppb
2016-11-08680-131994-12.70 ppb
2016-11-08680-131994-22.70 ppb
2017-08-17353312840011.90 ppb
2017-08-17353312840011.90 ppb
2017-11-16353495340020.800 ppb
2017-11-16353495340012.40 ppb
2017-11-16353495340012.40 ppb
2017-11-16353495340020.800 ppb
2018-08-3035414807001ND
2018-08-3035414807001ND
2018-11-02354282160021.000 ppb
2018-11-02354282160010.820 ppb
2018-11-02354282160010.820 ppb
2018-11-02354282160021.000 ppb
2019-08-01354868030013.40 ppb
2019-08-01354868030013.40 ppb
2019-11-0735510931001ND
2019-11-0735510931001ND