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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Marshall Waterworks

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.

 

51

Samples

0

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.667 ppb32ND - 1.30 ppb
20131.63 ppb1510ND - 7.90 ppb
20141.36 ppb106ND - 7.10 ppb
20151.000 ppb220.500 ppb - 1.50 ppb
20160.520 ppb105ND - 1.20 ppb
20170.873 ppb116ND - 2.70 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
2012-07-31E120503025ND
2012-07-31E1205030231.30 ppb
2012-11-27E1210000080.700 ppb
2013-01-23E1211053041.50 ppb
2013-01-23E1211053011.50 ppb
2013-04-30E1302023380.500 ppb
2013-04-30E1302023362.10 ppb
2013-07-16E1305058051.20 ppb
2013-07-16E1305057987.90 ppb
2013-07-16E1305058082.60 ppb
2013-07-16E1305058023.20 ppb
2013-08-12E130800799ND
2013-08-12E130800798ND
2013-08-30E130804729ND
2013-08-30E130804741ND
2013-08-30E130804753ND
2013-10-07E1308038451.80 ppb
2013-10-07E1308038402.10 ppb
2014-01-14E131200005ND
2014-02-10E141204239ND
2014-04-07E1403042391.20 ppb
2014-07-08E140601326ND
2014-07-08E1406013250.900 ppb
2014-07-08E1406013322.00 ppb
2014-07-16E1406013311.10 ppb
2014-07-16E1403042377.10 ppb
2014-10-28E140802403ND
2014-10-28E1408023981.30 ppb
2015-07-14VA010-DCLS0.500 ppb
2015-07-14VA010-DCLS1.50 ppb
2016-02-10E151204276ND
2016-02-10E1512042750.800 ppb
2016-05-11E160303031ND
2016-05-11E1603030321.000 ppb
2016-07-19E160703075ND
2016-07-19E160703076ND
2016-07-19E1607030731.000 ppb
2016-07-19E1607030771.20 ppb
2016-12-01E1609016741.20 ppb
2016-12-01E160901673ND
2017-02-28E1612018780.800 ppb
2017-02-28E161201879ND
2017-06-20E170302823ND
2017-06-20E1703028222.70 ppb
2017-07-11E1706003380.600 ppb
2017-08-29E1706003412.50 ppb
2017-08-30E1706003331.50 ppb
2017-08-30E170600340ND
2017-08-30E170600336ND
2017-12-06E1708055081.50 ppb
2017-12-06E170805503ND