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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Winebrook Hills Water District

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

 

21

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
20180.640 ppb43ND - 1.04 ppb
20190.890 ppb110.890 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
2014-02-251644-TTHM/HAA5ND
2014-05-295144-TTHM/HAA5ND
2014-08-27C001654-02TTHM/HND
2014-11-20WH02-TTHM/HAA5ND
2015-02-2302-TTHM/HAA5ND
2015-05-28C007670-TTHM/HAAND
2015-08-26C010011-02TTHM/HND
2015-11-16C011960-02TTHM/HND
2016-02-23C013978-02TTHM/HND
2016-05-25C016308-01TTHM/HND
2016-08-24C019090-01TTHM/HND
2016-11-28C021885-02TTHM/HND
2017-02-15C023676-02TTHM/HND
2017-05-24C026163-01TTHM/HND
2017-08-24C029180-02TTHM/HND
2017-11-20C031519-01TTHM/HND
2018-02-22C033456-01TTHM/HND
2018-05-23C035593-02LRAA10.880 ppb
2018-08-21C038481-02TTHM/H1.04 ppb
2018-11-19C040882-12TTHM/H0.640 ppb
2019-08-20C047592-11TTHM/H0.890 ppb