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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Texas State University - San Marcos

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

79

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.14 ppb1611ND - 5.80 ppb
20151.98 ppb1716ND - 4.20 ppb
20162.10 ppb1713ND - 8.60 ppb
20171.50 ppb1712ND - 3.10 ppb
20181.65 ppb1713ND - 3.40 ppb
20191.45 ppb1714ND - 3.10 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
2014-03-10AC461911.000 ppb
2014-03-10AC461924.00 ppb
2014-03-10AC461932.10 ppb
2014-03-10AC461954.20 ppb
2014-06-02AC555825.80 ppb
2014-06-02AC556142.00 ppb
2014-06-02AC555812.70 ppb
2014-06-02AC556084.70 ppb
2014-08-26AC65242ND
2014-08-26AC65248ND
2014-08-26AC65246ND
2014-08-26AC652432.00 ppb
2014-11-10AC71516ND
2014-11-10AC71510ND
2014-11-10AC715111.30 ppb
2014-11-10AC715144.50 ppb
2015-01-23AC774521.10 ppb
2015-01-23AC774551.000 ppb
2015-01-23AC774531.10 ppb
2015-01-23AC774492.50 ppb
2015-06-08AC94978ND
2015-06-08AC948942.70 ppb
2015-06-08AC948981.40 ppb
2015-06-08AC948962.30 ppb
2015-06-08AC948922.50 ppb
2015-09-10AD065151.20 ppb
2015-09-10AD065301.60 ppb
2015-09-10AD065221.80 ppb
2015-09-10AD065201.20 ppb
2015-12-01AD148983.40 ppb
2015-12-01AD148703.00 ppb
2015-12-01AD148732.70 ppb
2015-12-01AD149034.20 ppb
2016-02-25AD25745ND
2016-02-25AD257052.00 ppb
2016-02-25AD25674ND
2016-02-25AD256761.000 ppb
2016-02-25AD256738.10 ppb
2016-06-16AD409501.50 ppb
2016-06-16AD40946ND
2016-06-16AD409441.50 ppb
2016-06-16AD409472.20 ppb
2016-08-03AD468661.70 ppb
2016-08-03AD468642.10 ppb
2016-08-03AD468651.50 ppb
2016-08-03AD468682.40 ppb
2016-10-17AD533921.40 ppb
2016-10-17AD53390ND
2016-10-17AD533911.70 ppb
2016-10-17AD533938.60 ppb
2017-02-21AD71252ND
2017-02-21AD71264ND
2017-02-21AD712502.40 ppb
2017-02-21AD712463.10 ppb
2017-04-20AD80428ND
2017-04-20AD803782.60 ppb
2017-04-20AD80380ND
2017-04-20AD803761.60 ppb
2017-04-20AD803752.50 ppb
2017-07-06AD884672.70 ppb
2017-07-06AD88470ND
2017-07-06AD884691.10 ppb
2017-07-06AD884721.60 ppb
2017-10-18AE013132.60 ppb
2017-10-18AE013342.40 ppb
2017-10-18AE013211.50 ppb
2017-10-18AE013161.40 ppb
2018-02-05AE12243ND
2018-02-05AE121611.80 ppb
2018-02-05AE121541.70 ppb
2018-02-05AE121511.50 ppb
2018-02-05AE12158ND
2018-04-09AE216231.20 ppb
2018-04-09AE216341.90 ppb
2018-04-09AE215962.40 ppb
2018-04-09AE216052.20 ppb
2018-07-09AE325972.30 ppb
2018-07-09AE325982.40 ppb
2018-07-09AE325843.40 ppb
2018-07-09AE325823.20 ppb
2018-10-02AE42339ND
2018-10-02AE42333ND
2018-10-02AE423322.30 ppb
2018-10-02AE423361.70 ppb
2019-01-15AE49833ND
2019-01-15AE497831.30 ppb
2019-01-15AE497891.70 ppb
2019-01-15AE497882.00 ppb
2019-01-15AE497871.60 ppb
2019-04-29AE63911ND
2019-04-29AE638951.20 ppb
2019-04-29AE638931.90 ppb
2019-04-29AE639082.20 ppb
2019-07-09AE73650ND
2019-07-09AE736491.80 ppb
2019-07-09AE736513.10 ppb
2019-07-09AE736452.00 ppb
2019-10-03AE856271.90 ppb
2019-10-03AE856231.90 ppb
2019-10-03AE856281.10 ppb
2019-10-03AE856221.000 ppb