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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Niles

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.400 ppb42ND - 1.000 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20180.175 ppb162ND - 1.60 ppb
20190.242 ppb122ND - 1.90 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
2014-08-05LLF311801.000 ppb
2014-08-05LLF311810.600 ppb
2014-08-05LLF31177ND
2014-08-05LLF31179ND
2018-03-05LLH68935ND
2018-03-05LLH68936ND
2018-06-25LLH88919ND
2018-06-25LLH88920ND
2018-06-25LLH88921ND
2018-08-06LLH97145ND
2018-08-06LLH97147ND
2018-08-06LLH97146ND
2018-08-06LLH971491.60 ppb
2018-08-06LLH971501.20 ppb
2018-09-13LLI05494ND
2018-09-17LLI06126ND
2018-09-17LLI06127ND
2018-09-17LLI06128ND
2018-11-27LLI16871ND
2018-11-27LLI16872ND
2019-02-11LLI25175ND
2019-02-11LLI25174ND
2019-02-11LLI25176ND
2019-06-19LLI44899ND
2019-06-19LLI44898ND
2019-08-20LLI580481.90 ppb
2019-08-20LLI580491.000 ppb
2019-09-17LLI64906ND
2019-09-17LLI64907ND
2019-09-17LLI64908ND
2019-12-10LLI82612ND
2019-12-10LLI82613ND