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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of La Porte

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

 

127

Samples

0

Samples exceeding legal limit (MCL)

93

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.16 ppb17171.000 ppb - 5.30 ppb
20151.73 ppb2219ND - 4.00 ppb
20160.550 ppb226ND - 2.60 ppb
20172.11 ppb22221.70 ppb - 3.10 ppb
20181.31 ppb2216ND - 3.10 ppb
20190.855 ppb2213ND - 1.90 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
2014-02-10AC419082.90 ppb
2014-02-10AC419092.50 ppb
2014-02-10AC418973.10 ppb
2014-02-10AC419012.50 ppb
2014-03-19AC475891.000 ppb
2014-04-04AC495762.20 ppb
2014-04-04AC495732.20 ppb
2014-04-04AC495751.90 ppb
2014-04-04AC495901.40 ppb
2014-08-22AC651164.80 ppb
2014-08-22AC651134.20 ppb
2014-09-25AC683192.40 ppb
2014-09-25AC682982.60 ppb
2014-12-12AC748814.40 ppb
2014-12-12AC748775.20 ppb
2014-12-12AC748715.10 ppb
2014-12-12AC748785.30 ppb
2015-01-26AC775851.80 ppb
2015-01-26AC775831.80 ppb
2015-01-26AC775951.90 ppb
2015-01-26AC775911.90 ppb
2015-01-26AC775932.10 ppb
2015-01-26AC776071.90 ppb
2015-01-26AC777412.50 ppb
2015-01-26AC777362.40 ppb
2015-01-26AC777202.70 ppb
2015-01-26AC777222.60 ppb
2015-04-07AC87429ND
2015-04-07AC87432ND
2015-04-07AC87434ND
2015-04-07AC874381.50 ppb
2015-07-21AD003721.60 ppb
2015-07-21AD003541.90 ppb
2015-07-21AD003704.00 ppb
2015-07-21AD003711.80 ppb
2015-12-02AD151431.30 ppb
2015-12-02AD151451.40 ppb
2015-12-02AD151281.60 ppb
2015-12-02AD151471.40 ppb
2016-01-20AD18968ND
2016-01-20AD18988ND
2016-01-20AD18962ND
2016-01-20AD18946ND
2016-01-20AD18950ND
2016-01-20AD18899ND
2016-01-20AD18900ND
2016-01-20AD188941.40 ppb
2016-01-20AD18896ND
2016-04-12AD32819ND
2016-04-12AD32754ND
2016-04-12AD32776ND
2016-04-12AD327821.10 ppb
2016-04-12AD32775ND
2016-07-15AD44491ND
2016-07-15AD44523ND
2016-07-15AD44504ND
2016-07-15AD44508ND
2016-10-04AD524352.40 ppb
2016-10-04AD524672.60 ppb
2016-10-04AD524592.10 ppb
2016-10-04AD524652.50 ppb
2017-01-18AD654071.70 ppb
2017-01-18AD653772.20 ppb
2017-01-18AD654012.20 ppb
2017-01-18AD654032.40 ppb
2017-01-18AD653992.20 ppb
2017-01-18AD653832.10 ppb
2017-01-18AD653171.70 ppb
2017-01-18AD653231.70 ppb
2017-01-18AD653221.90 ppb
2017-01-18AD653161.70 ppb
2017-05-01AD817922.50 ppb
2017-05-01AD817892.50 ppb
2017-05-01AD817942.60 ppb
2017-05-01AD817912.60 ppb
2017-07-17AD894742.20 ppb
2017-07-17AD894631.90 ppb
2017-07-17AD894763.10 ppb
2017-07-17AD894752.40 ppb
2017-11-16AE051521.70 ppb
2017-11-16AE051531.70 ppb
2017-11-16AE051511.70 ppb
2017-11-16AE051501.70 ppb
2018-01-29AE11032ND
2018-01-29AE11048ND
2018-01-29AE10996ND
2018-01-29AE11056ND
2018-01-29AE109941.000 ppb
2018-01-29AE110241.000 ppb
2018-01-29AE10927ND
2018-01-29AE10917ND
2018-01-29AE109261.30 ppb
2018-01-29AE109251.20 ppb
2018-04-13AE224961.30 ppb
2018-04-13AE224581.50 ppb
2018-04-13AE224571.40 ppb
2018-04-13AE224551.50 ppb
2018-08-15AE371861.80 ppb
2018-08-15AE371881.80 ppb
2018-08-15AE371871.80 ppb
2018-08-15AE371851.70 ppb
2018-10-29AE447083.00 ppb
2018-10-29AE447072.80 ppb
2018-10-29AE447093.10 ppb
2018-10-29AE447102.60 ppb
2019-01-09AE49193ND
2019-01-09AE49201ND
2019-01-09AE49197ND
2019-01-09AE49195ND
2019-01-09AE49203ND
2019-01-09AE49199ND
2019-02-22AE556311.000 ppb
2019-02-22AE55629ND
2019-02-22AE55630ND
2019-02-22AE556321.10 ppb
2019-04-01AE606561.40 ppb
2019-04-01AE606551.40 ppb
2019-04-01AE606541.30 ppb
2019-04-01AE606531.30 ppb
2019-07-10AE738661.60 ppb
2019-07-10AE738641.50 ppb
2019-07-10AE738691.60 ppb
2019-07-10AE738651.60 ppb
2019-10-10AE862761.90 ppb
2019-10-10AE862751.80 ppb
2019-10-10AE86274ND
2019-10-10AE862731.30 ppb