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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Buttonwillow County 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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.40 ppb115.40 ppb
20154.10 ppb114.10 ppb
2016ND20ND
20175.30 ppb115.30 ppb
2018ND20ND
2019ND10ND

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
2014-08-255806-900-10105.40 ppb
2015-08-125806-900-13154.10 ppb
2016-08-165806-900-1435ND
2016-12-225806-001-1025ND
2017-08-285806-900-13005.30 ppb
2018-09-195806-003-0930ND
2018-12-315806-900-1000ND
2019-08-275806-900-0910ND