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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Harris County MUD 55 Heritage Park

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.

MORE ABOUT THIS CONTAMINANT

 

106

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20143.17 ppb16161.30 ppb - 4.90 ppb
20151.39 ppb1817ND - 2.10 ppb
20160.589 ppb186ND - 2.30 ppb
20172.13 ppb1814ND - 8.00 ppb
20180.889 ppb189ND - 3.00 ppb
20191.26 ppb188ND - 3.70 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
2014-02-14AC430352.60 ppb
2014-02-14AC430562.70 ppb
2014-02-14AC430752.90 ppb
2014-02-14AC430592.40 ppb
2014-04-11AC504031.30 ppb
2014-04-11AC504111.50 ppb
2014-04-11AC504041.60 ppb
2014-04-11AC503961.40 ppb
2014-07-25AC611873.60 ppb
2014-07-25AC611914.30 ppb
2014-07-25AC611923.60 ppb
2014-07-25AC611883.70 ppb
2014-11-24AC727154.70 ppb
2014-11-24AC727214.80 ppb
2014-11-24AC727134.70 ppb
2014-11-24AC727144.90 ppb
2015-01-16AC766421.10 ppb
2015-01-16AC766401.000 ppb
2015-01-16AC766172.10 ppb
2015-01-16AC766152.00 ppb
2015-01-16AC766132.00 ppb
2015-01-16AC766162.00 ppb
2015-04-13AC879421.40 ppb
2015-04-13AC879501.30 ppb
2015-04-13AC87940ND
2015-04-13AC879411.20 ppb
2015-08-17AD042881.20 ppb
2015-08-17AD043051.90 ppb
2015-08-17AD042781.70 ppb
2015-08-17AD042481.60 ppb
2015-12-15AD169481.20 ppb
2015-12-15AD169491.10 ppb
2015-12-15AD169501.10 ppb
2015-12-15AD169471.20 ppb
2016-02-10AD23096ND
2016-02-10AD23004ND
2016-02-10AD22997ND
2016-02-10AD23000ND
2016-02-10AD22998ND
2016-05-11AD36367ND
2016-05-11AD36357ND
2016-05-11AD36370ND
2016-05-11AD363611.10 ppb
2016-06-20AD41191ND
2016-09-16AD50013ND
2016-09-16AD50044ND
2016-09-16AD500581.000 ppb
2016-09-16AD50059ND
2016-10-20AD540292.00 ppb
2016-10-20AD540252.00 ppb
2016-10-20AD540212.30 ppb
2016-10-20AD540262.20 ppb
2017-01-25AD66804ND
2017-01-25AD667621.10 ppb
2017-01-25AD66765ND
2017-01-25AD667731.10 ppb
2017-01-25AD667801.30 ppb
2017-05-24AD854922.30 ppb
2017-05-24AD854043.00 ppb
2017-05-24AD854022.80 ppb
2017-05-24AD854012.70 ppb
2017-05-24AD854033.30 ppb
2017-07-31AD913063.90 ppb
2017-07-31AD913024.10 ppb
2017-07-31AD913082.20 ppb
2017-07-31AD913078.00 ppb
2017-10-30AE026231.30 ppb
2017-10-30AE026261.20 ppb
2017-10-30AE02637ND
2017-10-30AE02638ND
2018-01-23AE09856ND
2018-01-23AE09858ND
2018-01-23AE09832ND
2018-01-23AE09844ND
2018-01-23AE09846ND
2018-01-23AE09833ND
2018-04-11AE222301.40 ppb
2018-04-11AE222321.30 ppb
2018-04-11AE222311.30 ppb
2018-04-11AE222331.50 ppb
2018-07-18AE33741ND
2018-07-18AE337361.10 ppb
2018-07-18AE337401.10 ppb
2018-07-18AE33734ND
2018-10-22AE441052.50 ppb
2018-10-22AE441062.80 ppb
2018-10-22AE441083.00 ppb
2018-10-22AE44102ND
2019-02-26AE56014ND
2019-02-26AE56012ND
2019-02-26AE55909ND
2019-02-26AE55910ND
2019-02-26AE55911ND
2019-02-26AE55907ND
2019-05-24AE68103ND
2019-05-24AE68106ND
2019-05-24AE68101ND
2019-05-24AE68100ND
2019-08-13AE782742.20 ppb
2019-08-13AE782702.10 ppb
2019-08-13AE782722.20 ppb
2019-08-13AE782712.00 ppb
2019-12-05AE914033.70 ppb
2019-12-05AE914043.10 ppb
2019-12-05AE913823.70 ppb
2019-12-05AE913833.60 ppb