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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

University of Connecticut - Main Campus

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

 

130

Samples

0

Samples exceeding legal limit (MCL)

118

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.56 ppb1918ND - 5.60 ppb
20152.91 ppb1916ND - 6.60 ppb
20163.51 ppb1816ND - 6.80 ppb
20173.99 ppb2220ND - 7.10 ppb
20185.09 ppb2624ND - 9.40 ppb
20194.90 ppb2624ND - 9.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-03-10BG17096TTHM1.50 ppb
2014-03-10BG17099TTHM3.40 ppb
2014-03-10BG17101TTHM1.40 ppb
2014-03-10BG17102TTHM1.80 ppb
2014-04-24BG36616VOC10.770 ppb
2014-04-24BG36617VOC1ND
2014-06-12BG56337TTHM2.60 ppb
2014-06-12BG56340TTHM5.60 ppb
2014-06-12BG56345TTHM2.90 ppb
2014-06-12BG56346TTHM3.10 ppb
2014-06-27BG66061VOC10.580 ppb
2014-09-16BH14164TTHM2.30 ppb
2014-09-16BH14167TTHM5.60 ppb
2014-09-16BH14172TTHM2.20 ppb
2014-09-16BH14173TTHM2.40 ppb
2014-12-10BH51407TTHM2.90 ppb
2014-12-10BH51410TTHM4.30 ppb
2014-12-10BH51415TTHM2.60 ppb
2014-12-10BH51416TTHM2.60 ppb
2015-01-22BH66096VOC1ND
2015-01-22BH66098VOC1ND
2015-01-22BH66097VOC1ND
2015-03-09BH80470TTHM1.70 ppb
2015-03-09BH80473TTHM3.70 ppb
2015-03-12BH82671TTHM1.90 ppb
2015-03-12BH82672TTHM1.70 ppb
2015-06-08BJ27397TTHM4.30 ppb
2015-06-08BJ27398TTHM2.70 ppb
2015-06-08BJ27393TTHM5.50 ppb
2015-06-08BJ27390TTHM2.80 ppb
2015-09-22BJ95542TTHM3.20 ppb
2015-09-22BJ95541TTHM3.90 ppb
2015-09-22BJ95539TTHM3.60 ppb
2015-09-22BJ95540TTHM6.60 ppb
2015-12-09BK34680TTHM3.20 ppb
2015-12-09BK34678TTHM5.10 ppb
2015-12-09BK34675TTHM2.70 ppb
2015-12-09BK34679TTHM2.70 ppb
2016-03-09BK75989TTHM2.60 ppb
2016-03-09BK75990TTHM2.90 ppb
2016-03-09BK75991TTHM2.70 ppb
2016-03-09BK75992TTHM4.80 ppb
2016-06-09BN51405TTHM2.30 ppb
2016-06-09BN51408TTHM6.40 ppb
2016-06-09BN51412TTHM3.60 ppb
2016-06-09BN51413TTHM2.50 ppb
2016-06-14BN54228VOC1ND
2016-06-14BN54227VOC1ND
2016-09-21BV20288TTHM3.40 ppb
2016-09-21BV20289TTHM3.50 ppb
2016-09-21BV20290TTHM2.80 ppb
2016-09-21BV20291TTHM6.80 ppb
2016-12-13BX04254TTHM4.30 ppb
2016-12-13BX04255TTHM4.20 ppb
2016-12-13BX04256TTHM5.30 ppb
2016-12-13BX04257TTHM5.10 ppb
2017-03-08BX81804TTHM3.20 ppb
2017-03-08BX81805TTHM3.30 ppb
2017-03-08BX81806TTHM6.00 ppb
2017-03-08BX81807TTHM4.80 ppb
2017-06-13BY38124TTHM2.40 ppb
2017-06-13BY38125TTHM4.70 ppb
2017-06-13BY38126TTHM2.60 ppb
2017-06-13BY38127TTHM5.30 ppb
2017-08-09BY81246TTHM6.50 ppb
2017-08-09BY81247TTHM5.70 ppb
2017-08-09BY81248TTHM4.80 ppb
2017-08-10BY82233TTHM5.70 ppb
2017-09-05BY94975TTHM5.30 ppb
2017-09-05BY94976TTHM7.10 ppb
2017-09-06BY95732TTHM4.10 ppb
2017-09-07BY96696TTHM2.80 ppb
2017-12-11BZ54499VOC1ND
2017-12-11BZ54498VOC1ND
2017-12-12BZ58240TTHM3.80 ppb
2017-12-12BZ58241TTHM2.10 ppb
2017-12-12BZ58242TTHM3.00 ppb
2017-12-12BZ58243TTHM4.60 ppb
2018-03-15CA02987TTHM5.80 ppb
2018-03-15CA02988TTHM3.20 ppb
2018-03-15CA02989TTHM6.90 ppb
2018-03-15CA02990TTHM4.10 ppb
2018-06-12CA68568TTHM6.40 ppb
2018-06-12CA68569TTHM5.50 ppb
2018-06-12CA68570TTHM6.00 ppb
2018-06-12CA68571TTHM3.70 ppb
2018-09-19DBP 2005061826.90 ppb
2018-09-19DBP 2005061849.40 ppb
2018-09-19DBP 2005061865.00 ppb
2018-09-19DBP 2005061893.80 ppb
2018-09-25DBP 2005067206.40 ppb
2018-09-25DBP 2005067219.40 ppb
2018-09-25DBP 2005067225.80 ppb
2018-09-25DBP 2005067235.70 ppb
2018-09-26DBP 2005069664.40 ppb
2018-09-27DBP 2005070736.60 ppb
2018-12-04DBP 2005147242.10 ppb
2018-12-04DBP 2005147257.90 ppb
2018-12-04DBP 2005147264.70 ppb
2018-12-04DBP 2005147284.10 ppb
2018-12-12VOC1 200515892ND
2018-12-12VOC1 200515895ND
2018-12-17DBP 2005162815.00 ppb
2018-12-17DBP 2005162823.60 ppb
2019-03-18DBP 2005250243.90 ppb
2019-03-18DBP 2005250263.70 ppb
2019-03-18DBP 2005250295.80 ppb
2019-03-18DBP 2005250315.60 ppb
2019-03-18DBP 2005250334.40 ppb
2019-03-18DBP 2005250343.80 ppb
2019-06-24DBP 2005375417.20 ppb
2019-06-24DBP 2005375425.40 ppb
2019-06-24DBP 2005375434.80 ppb
2019-06-25DBP 2005378064.30 ppb
2019-06-25DBP 2005378076.50 ppb
2019-06-25DBP 2005378089.50 ppb
2019-09-16DBP 2005490014.50 ppb
2019-09-16DBP 2005490022.70 ppb
2019-09-16DBP 2005490406.50 ppb
2019-09-16DBP 2005490418.20 ppb
2019-09-16DBP 2005490434.30 ppb
2019-09-16DBP 2005490444.50 ppb
2019-11-21VOC1 200557816ND
2019-11-21VOC1 200557817ND
2019-12-09DBP 2005594124.20 ppb
2019-12-09DBP 2005594163.30 ppb
2019-12-09DBP 2005594195.30 ppb
2019-12-09DBP 2005594229.60 ppb
2019-12-09DBP 2005594255.40 ppb
2019-12-09DBP 2005594274.10 ppb