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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Boone Water Works

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.16 ppb168ND - 3.70 ppb
20150.494 ppb1611ND - 1.000 ppb
20160.281 ppb168ND - 0.700 ppb
20170.163 ppb165ND - 0.600 ppb
20180.231 ppb165ND - 0.900 ppb
20190.138 ppb164ND - 0.600 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
2014-02-0320312323.70 ppb
2014-02-0320312333.50 ppb
2014-02-0320312403.40 ppb
2014-02-0320312483.40 ppb
2014-05-0520499811.40 ppb
2014-05-0520499831.000 ppb
2014-05-0520499851.10 ppb
2014-05-0520499801.10 ppb
2014-08-112072750ND
2014-08-112072751ND
2014-08-112072752ND
2014-08-112070710ND
2014-11-032090635ND
2014-11-032090639ND
2014-11-032090637ND
2014-11-032090634ND
2015-02-10OE2136050.700 ppb
2015-02-10OE2136060.700 ppb
2015-02-10OE2136070.700 ppb
2015-02-10OE2136040.700 ppb
2015-05-11OE2416840.500 ppb
2015-05-11OE2416850.500 ppb
2015-05-11OE241682ND
2015-05-11OE241683ND
2015-08-03OE275082ND
2015-08-03OE2750800.600 ppb
2015-08-03OE275081ND
2015-08-03OE275083ND
2015-11-16OE3182260.900 ppb
2015-11-16OE3182270.900 ppb
2015-11-16OE3182281.000 ppb
2015-11-16OE3182290.700 ppb
2016-02-01OE3406950.500 ppb
2016-02-01OE340692ND
2016-02-01OE340694ND
2016-02-01OE340693ND
2016-05-09OE375919ND
2016-05-09OE375920ND
2016-05-09OE375918ND
2016-05-09OE375917ND
2016-08-01OE408875ND
2016-08-01OE4088760.600 ppb
2016-08-01OE4088770.500 ppb
2016-08-01OE4088780.600 ppb
2016-11-07OE4493960.700 ppb
2016-11-07OE4493950.500 ppb
2016-11-07OE4493940.500 ppb
2016-11-07OE4493970.600 ppb
2017-02-06OE4779830.500 ppb
2017-02-06OE477984ND
2017-02-06OE4779850.500 ppb
2017-02-06OE477986ND
2017-05-01OE507991ND
2017-05-01OE507990ND
2017-05-01OE5079920.500 ppb
2017-05-01OE507993ND
2017-08-01OE5452690.500 ppb
2017-08-01OE545268ND
2017-08-01OE545270ND
2017-08-01OE545271ND
2017-11-13OE5898570.600 ppb
2017-11-13OE589858ND
2017-11-13OE589859ND
2017-11-13OE589856ND
2018-02-12OE6215870.900 ppb
2018-02-12OE6215860.700 ppb
2018-02-12OE6215850.900 ppb
2018-02-12OE6215840.700 ppb
2018-05-07OE654725ND
2018-05-07OE654722ND
2018-05-07OE654723ND
2018-05-07OE654724ND
2018-08-06OE694600ND
2018-08-06OE694599ND
2018-08-06OE694598ND
2018-08-06OE694597ND
2018-11-05OE735738ND
2018-11-05OE735739ND
2018-11-05OE735740ND
2018-11-05OE7357410.500 ppb
2019-02-04OE766796ND
2019-02-04OE766797ND
2019-02-04OE766798ND
2019-02-04OE766799ND
2019-05-06OE804064ND
2019-05-06OE804067ND
2019-05-06OE804066ND
2019-05-06OE804065ND
2019-08-05OE845153ND
2019-08-05OE845155ND
2019-08-05OE845154ND
2019-08-05OE8451520.500 ppb
2019-11-04OE8886830.600 ppb
2019-11-04OE888682ND
2019-11-04OE8886810.500 ppb
2019-11-04OE8886800.600 ppb