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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Ferndale

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20180.400 ppb42ND - 0.900 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
2014-03-11LLF11716ND
2014-06-10LLF22441ND
2014-09-09LLF37828ND
2014-12-09LLF49291ND
2018-03-06LLH69166ND
2018-06-05LLH84240ND
2018-09-06LLI038680.900 ppb
2018-12-04LLI178420.700 ppb
2019-03-05LLI28325ND
2019-06-18LLI44393ND
2019-09-09LLI62650ND
2019-12-04LLI81349ND