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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Katy

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

 

129

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.141 ppb172ND - 1.40 ppb
20150.213 ppb235ND - 1.60 ppb
2016ND240ND
2017ND220ND
20180.118 ppb222ND - 1.50 ppb
2019ND210ND

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
2014-02-24AC44231ND
2014-02-24AC44185ND
2014-02-24AC44184ND
2014-02-24AC44209ND
2014-05-01AC52701ND
2014-05-01AC52664ND
2014-05-01AC52666ND
2014-05-01AC52665ND
2014-07-25AC61213ND
2014-07-25AC61211ND
2014-07-25AC61212ND
2014-07-25AC61215ND
2014-07-25AC611141.40 ppb
2014-10-27AC70591ND
2014-10-27AC70590ND
2014-10-27AC70553ND
2014-10-27AC705871.000 ppb
2015-01-20AC767740.500 ppb
2015-01-20AC767760.600 ppb
2015-01-20AC76772ND
2015-01-20AC76782ND
2015-01-20AC76792ND
2015-01-20AC76910ND
2015-01-20AC76925ND
2015-01-20AC76908ND
2015-01-20AC76909ND
2015-05-28AC936171.60 ppb
2015-05-28AC93758ND
2015-05-28AC93737ND
2015-05-28AC937311.20 ppb
2015-05-28AC93759ND
2015-05-28AC93621ND
2015-07-14AC993201.000 ppb
2015-07-14AC99321ND
2015-07-14AC99322ND
2015-07-14AC99323ND
2015-10-12AD10202ND
2015-10-12AD10218ND
2015-10-12AD10220ND
2015-10-12AD10216ND
2016-01-14AD18229ND
2016-01-14AD18263ND
2016-01-14AD18231ND
2016-01-14AD18223ND
2016-01-14AD18225ND
2016-01-14AD18166ND
2016-01-14AD18172ND
2016-01-14AD18167ND
2016-01-14AD18169ND
2016-03-15AD28802ND
2016-04-08AD32525ND
2016-04-08AD32536ND
2016-04-08AD32501ND
2016-04-08AD32502ND
2016-07-18AD44454ND
2016-07-18AD44471ND
2016-07-18AD44455ND
2016-07-18AD44456ND
2016-07-18AD44547ND
2016-10-07AD52793ND
2016-10-07AD52799ND
2016-10-07AD52789ND
2016-10-07AD52797ND
2016-10-07AD52842ND
2017-01-10AD63952ND
2017-01-10AD63969ND
2017-01-10AD63966ND
2017-01-10AD63967ND
2017-02-09AD70006ND
2017-02-09AD69940ND
2017-02-09AD69942ND
2017-02-09AD69952ND
2017-02-09AD69938ND
2017-02-09AD69958ND
2017-04-04AD78275ND
2017-04-04AD78276ND
2017-04-04AD78277ND
2017-04-04AD78274ND
2017-07-13AD89291ND
2017-07-13AD89292ND
2017-07-13AD89288ND
2017-07-13AD89286ND
2017-10-09AD99781ND
2017-10-09AD99780ND
2017-10-09AD99787ND
2017-10-09AD99782ND
2018-01-08AE080521.50 ppb
2018-01-08AE08062ND
2018-01-08AE08060ND
2018-01-08AE08056ND
2018-01-08AE08058ND
2018-01-08AE08054ND
2018-01-08AE08040ND
2018-01-08AE08041ND
2018-01-08AE08045ND
2018-01-08AE08044ND
2018-04-04AE21192ND
2018-04-04AE21191ND
2018-04-04AE211901.10 ppb
2018-04-04AE21193ND
2018-07-06AE32593ND
2018-07-06AE32605ND
2018-07-06AE32590ND
2018-07-06AE32603ND
2018-10-24AE44471ND
2018-10-24AE44472ND
2018-10-24AE44465ND
2018-10-24AE44466ND
2019-01-14AE49623ND
2019-01-14AE49615ND
2019-01-14AE49617ND
2019-01-14AE49629ND
2019-01-14AE49613ND
2019-01-14AE49538ND
2019-01-14AE49539ND
2019-01-14AE49537ND
2019-01-14AE49540ND
2019-04-05AE61354ND
2019-04-05AE61353ND
2019-04-05AE61355ND
2019-04-05AE61356ND
2019-07-11AE74113ND
2019-07-11AE74095ND
2019-07-11AE74093ND
2019-07-11AE74098ND
2019-10-03AE85642ND
2019-10-03AE85643ND
2019-10-03AE85641ND
2019-10-03AE85644ND