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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Columbus

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

 

98

Samples

0

Samples exceeding legal limit (MCL)

71

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20146.57 ppb139ND - 12.3 ppb
20157.96 ppb2116ND - 14.3 ppb
20168.51 ppb2016ND - 16.9 ppb
20178.90 ppb2116ND - 16.9 ppb
20188.05 ppb1712ND - 17.4 ppb
20194.88 ppb62ND - 15.0 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
2014-01-27278476ND
2014-04-07293475ND
2014-07-07309738ND
2014-08-113104746.77 ppb
2014-09-2332418712.3 ppb
2014-09-233241889.54 ppb
2014-09-233241899.22 ppb
2014-09-2332419010.7 ppb
2014-10-06328594ND
2014-10-273329099.38 ppb
2014-10-2733291011.6 ppb
2014-10-273329118.70 ppb
2014-10-273329127.17 ppb
2015-01-05343322ND
2015-02-09343323ND
2015-03-0234871811.5 ppb
2015-03-023487193.91 ppb
2015-03-0234872011.1 ppb
2015-03-023487213.49 ppb
2015-04-01353635ND
2015-06-0136495714.3 ppb
2015-06-0136495813.7 ppb
2015-06-0136495911.6 ppb
2015-06-0136496013.5 ppb
2015-07-06371054ND
2015-09-083787418.50 ppb
2015-09-0837874314.0 ppb
2015-09-0837874212.0 ppb
2015-09-0837874012.0 ppb
2015-10-05391882ND
2015-12-014021269.00 ppb
2015-12-0140212711.7 ppb
2015-12-0140212810.6 ppb
2015-12-014021296.27 ppb
2016-01-20ND
2016-02-294.53 ppb
2016-02-295.76 ppb
2016-02-299.42 ppb
2016-02-2911.1 ppb
2016-04-11ND
2016-06-085.22 ppb
2016-06-0810.00 ppb
2016-06-0810.9 ppb
2016-06-0812.7 ppb
2016-07-05ND
2016-09-0611.7 ppb
2016-09-0610.7 ppb
2016-09-0612.2 ppb
2016-09-066.88 ppb
2016-11-07ND
2016-12-0510.4 ppb
2016-12-0516.9 ppb
2016-12-0515.0 ppb
2016-12-0516.8 ppb
2017-03-01ND
2017-03-0615.9 ppb
2017-03-0616.9 ppb
2017-03-0613.9 ppb
2017-03-0613.1 ppb
2017-04-10ND
2017-06-0513.4 ppb
2017-06-0510.5 ppb
2017-06-057.98 ppb
2017-06-0512.7 ppb
2017-06-12ND
2017-09-066.35 ppb
2017-09-0612.7 ppb
2017-09-0612.8 ppb
2017-09-066.16 ppb
2017-09-11ND
2017-10-10ND
2017-12-047.37 ppb
2017-12-0412.8 ppb
2017-12-0412.4 ppb
2017-12-0412.0 ppb
2018-01-03530737ND
2018-02-26530738ND
2018-03-055340685.57 ppb
2018-03-0553406713.4 ppb
2018-03-0553406610.7 ppb
2018-03-055340656.70 ppb
2018-04-02541803ND
2018-06-0454978616.8 ppb
2018-06-0454978717.4 ppb
2018-06-0454978811.5 ppb
2018-06-0454978913.2 ppb
2018-07-09560150ND
2018-09-045684955.45 ppb
2018-09-0456849614.4 ppb
2018-09-0456849712.4 ppb
2018-09-045684989.35 ppb
2018-10-15577007ND
2019-01-14590554ND
2019-04-01602852ND
2019-07-08621112ND
2019-07-1562364615.0 ppb
2019-07-1562364514.3 ppb
2019-10-07638483ND