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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Swiftwater Dev Association Inc.

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.26 ppb112.26 ppb
20134.43 ppb114.43 ppb
201428.2 ppb1128.2 ppb
201544.0 ppb881.09 ppb - 67.2 ppb
201614.2 ppb86ND - 50.8 ppb
2017ND60ND

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
2012-02-27120228-018TH2.26 ppb
2013-06-17130618-004TH4.43 ppb
2014-07-09140710-025TH28.2 ppb
2015-03-11150312-004TH64.1 ppb
2015-03-11150312-003TH7.34 ppb
2015-06-10150611-013TH32.7 ppb
2015-06-10150611-014TH1.09 ppb
2015-09-17150918-004TH56.1 ppb
2015-09-17150918-003TH57.6 ppb
2015-12-09151210-012TH67.2 ppb
2015-12-09151210-011TH65.9 ppb
2016-03-09160310-002TH1.73 ppb
2016-03-09160310-001TH1.65 ppb
2016-06-09160610-016TH50.8 ppb
2016-06-09160610-015TH48.4 ppb
2016-09-08160909-008THND
2016-09-08160909-007THND
2016-12-19161220-009TH5.75 ppb
2016-12-19161220-008TH5.62 ppb
2017-03-30170331-005THND
2017-03-30170331-006THND
2017-11-08171109-021THND
2017-11-08171109-020THND
2017-12-06171207-005THND
2017-12-06171207-004THND