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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Logan City Water System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.117 ppb61ND - 0.700 ppb
2013ND50ND
2014ND20ND
20150.0833 ppb61ND - 0.500 ppb
2016ND30ND
2017ND20ND

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 Result
2012-08-15ND
2012-08-150.700 ppb
2012-08-15ND
2012-08-15ND
2012-08-15ND
2012-08-15ND
2013-08-06ND
2013-08-06ND
2013-08-07ND
2013-10-09ND
2013-10-09ND
2014-08-19ND
2014-08-19ND
2015-07-29ND
2015-07-29ND
2015-07-29ND
2015-07-29ND
2015-08-13ND
2015-08-130.500 ppb
2016-02-26ND
2016-08-22ND
2016-08-22ND
2017-08-15ND
2017-08-15ND