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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

City of South Houston

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

108

Samples

0

Samples exceeding legal limit (MCL)

86

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20128.22 ppb1312ND - 18.3 ppb
20133.36 ppb16161.60 ppb - 5.90 ppb
20145.94 ppb16161.80 ppb - 15.2 ppb
20151.74 ppb2117ND - 4.20 ppb
20160.405 ppb214ND - 2.30 ppb
20172.63 ppb21211.50 ppb - 5.80 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2012-02-06AB802372.20 ppb
2012-05-18AB902515.60 ppb
2012-05-18AB90264ND
2012-05-18AB9025415.4 ppb
2012-05-18AB902507.30 ppb
2012-07-06AB946809.10 ppb
2012-07-06AB9466218.3 ppb
2012-07-06AB9466315.0 ppb
2012-07-06AB946798.30 ppb
2012-10-12AC032063.70 ppb
2012-10-12AC032185.70 ppb
2012-10-12AC032073.80 ppb
2012-10-12AC0321912.5 ppb
2013-01-14AC075731.60 ppb
2013-01-14AC075671.90 ppb
2013-01-14AC075741.70 ppb
2013-01-14AC075681.90 ppb
2013-04-02AC154673.20 ppb
2013-04-02AC154573.10 ppb
2013-04-02AC154603.30 ppb
2013-04-02AC154633.40 ppb
2013-07-19AC253164.50 ppb
2013-07-19AC253215.90 ppb
2013-07-19AC252854.60 ppb
2013-07-19AC253225.80 ppb
2013-10-24AC332283.20 ppb
2013-10-24AC332213.10 ppb
2013-10-24AC332033.50 ppb
2013-10-24AC332023.00 ppb
2014-02-14AC430912.70 ppb
2014-02-14AC430682.30 ppb
2014-02-14AC430702.70 ppb
2014-02-14AC430232.60 ppb
2014-04-07AC496121.80 ppb
2014-04-07AC496152.00 ppb
2014-04-07AC495822.00 ppb
2014-06-06AC5629815.2 ppb
2014-08-11AC629017.60 ppb
2014-08-11AC629292.30 ppb
2014-08-11AC629009.90 ppb
2014-08-11AC629029.50 ppb
2014-11-24AC727866.60 ppb
2014-11-24AC727209.20 ppb
2014-11-24AC727826.70 ppb
2014-11-24AC7278712.0 ppb
2015-01-21AC771011.60 ppb
2015-01-21AC770951.60 ppb
2015-01-21AC770931.50 ppb
2015-01-21AC770991.60 ppb
2015-01-21AC771091.40 ppb
2015-01-21AC772021.10 ppb
2015-01-21AC772042.20 ppb
2015-01-21AC772092.40 ppb
2015-01-21AC772032.00 ppb
2015-06-12AC95899ND
2015-06-12AC95900ND
2015-06-12AC95927ND
2015-06-12AC95907ND
2015-07-20AD001211.80 ppb
2015-07-20AD000771.40 ppb
2015-07-20AD001051.50 ppb
2015-07-20AD001001.10 ppb
2015-10-06AD095904.20 ppb
2015-10-06AD095853.70 ppb
2015-10-06AD095924.10 ppb
2015-10-06AD095813.40 ppb
2016-01-14AD18207ND
2016-01-14AD18205ND
2016-01-14AD18221ND
2016-01-14AD18219ND
2016-01-14AD18215ND
2016-01-14AD18165ND
2016-01-14AD18163ND
2016-01-14AD18164ND
2016-01-14AD18162ND
2016-04-08AD32541ND
2016-04-08AD32546ND
2016-04-08AD32528ND
2016-04-08AD32535ND
2016-07-11AD43515ND
2016-07-11AD43522ND
2016-07-11AD43516ND
2016-07-11AD43555ND
2016-10-07AD527942.30 ppb
2016-10-07AD527982.20 ppb
2016-10-07AD527962.00 ppb
2016-10-07AD527952.00 ppb
2017-01-06AD636172.10 ppb
2017-01-06AD635611.70 ppb
2017-01-06AD635602.40 ppb
2017-01-06AD635632.30 ppb
2017-01-06AD635622.30 ppb
2017-03-01AD727855.60 ppb
2017-03-01AD727635.30 ppb
2017-03-01AD727655.80 ppb
2017-03-01AD727533.10 ppb
2017-04-07AD789122.60 ppb
2017-04-07AD789111.50 ppb
2017-04-07AD789102.20 ppb
2017-04-07AD789131.70 ppb
2017-07-14AD894142.70 ppb
2017-07-14AD894172.50 ppb
2017-07-14AD894192.80 ppb
2017-07-14AD894152.30 ppb
2017-10-17AE010591.50 ppb
2017-10-17AE010561.50 ppb
2017-10-17AE010601.60 ppb
2017-10-17AE010711.80 ppb