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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Country Club Water Supply Corporation

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.725 ppb42ND - 1.60 ppb
20150.543 ppb42ND - 1.10 ppb
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-03-25Q1409722002ND
2014-06-20Q1423352002ND
2014-09-29Q14491000021.60 ppb
2014-12-05Q14589170021.30 ppb
2015-03-03Q15079130021.10 ppb
2015-06-04Q1520645002ND
2015-09-24Q15377810021.07 ppb
2015-11-20Q1546551002ND
2016-02-16Q1606726002ND
2016-05-18Q1619959002ND
2016-09-16Q1638416002ND
2016-12-13Q1654152001ND
2017-02-21Q1707152003ND
2017-05-02Q1717974002ND
2017-07-27Q1731241002ND
2017-11-09Q1757671002ND
2018-02-05Q1804280002ND
2018-05-09Q1819120001ND
2018-08-27Q1834228001ND
2018-11-28Q1848256003ND
2019-01-22Q1903189002ND
2019-04-29Q1916933002ND
2019-08-01Q1950434002ND
2019-11-14Q1976906002ND