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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Parkers Chapel

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

 

125

Samples

0

Samples exceeding legal limit (MCL)

95

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.90 ppb2118ND - 13.1 ppb
20153.31 ppb2119ND - 13.7 ppb
20164.15 ppb2523ND - 11.3 ppb
20171.50 ppb2318ND - 7.39 ppb
20183.94 ppb1814ND - 19.3 ppb
20193.64 ppb1712ND - 12.3 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
2014-01-15140160122013.19 ppb
2014-01-15140160123014.70 ppb
2014-01-15140160121011.48 ppb
2014-01-151401601200113.1 ppb
2014-01-15140160120028.20 ppb
2014-04-29141210023017.05 ppb
2014-04-29141210022013.15 ppb
2014-04-29141210021012.47 ppb
2014-04-2914121002602ND
2014-04-29141210026010.133 ppb
2014-06-11141630070025.20 ppb
2014-06-11141630069027.10 ppb
2014-08-05142190101011.46 ppb
2014-08-05142190102017.87 ppb
2014-08-05142190099010.410 ppb
2014-08-05142190100010.709 ppb
2014-11-12143170027024.68 ppb
2014-11-12143170026014.32 ppb
2014-11-12143170027016.71 ppb
2014-12-0114338005801ND
2014-12-0114338005802ND
2015-03-10150710037010.0355 ppb
2015-03-10150710038010.408 ppb
2015-03-10150710035016.83 ppb
2015-03-10150710035024.51 ppb
2015-03-10150710036016.72 ppb
2015-05-27151480094014.67 ppb
2015-05-27151480095010.187 ppb
2015-05-27151480096010.00423 ppb
2015-06-02151540017029.20 ppb
2015-06-021515400180213.7 ppb
2015-06-24151760015022.22 ppb
2015-06-24151760015013.09 ppb
2015-08-25152380025010.0138 ppb
2015-08-25152380023015.39 ppb
2015-08-25152380024010.723 ppb
2015-10-14152890096016.20 ppb
2015-10-1415289009802ND
2015-10-14152890097010.243 ppb
2015-10-14152890096025.16 ppb
2015-10-14152890099010.168 ppb
2015-10-1415289009801ND
2016-01-12160150079015.71 ppb
2016-01-12160150080014.67 ppb
2016-01-12160150078014.79 ppb
2016-01-12160150081033.27 ppb
2016-01-12160150078023.87 ppb
2016-04-11161050051011.72 ppb
2016-04-111610500500111.3 ppb
2016-04-11161050052014.84 ppb
2016-04-11161050049018.00 ppb
2016-04-11161050050027.11 ppb
2016-04-11161050052023.41 ppb
2016-06-07161610068024.00 ppb
2016-06-07161610069024.10 ppb
2016-07-1316196014201ND
2016-07-13161960143011.66 ppb
2016-07-13161960144015.95 ppb
2016-07-13161960145012.94 ppb
2016-07-1316196014202ND
2016-10-12162870002034.30 ppb
2016-10-12162870003083.10 ppb
2016-10-12162870002082.96 ppb
2016-10-12162870003033.20 ppb
2016-10-12162870001014.38 ppb
2016-10-25163010032093.10 ppb
2016-10-25163010032035.39 ppb
2017-02-14170460052010.0626 ppb
2017-02-1417046004902ND
2017-02-14170460049010.00909 ppb
2017-02-14170460050010.134 ppb
2017-02-14170460051010.0614 ppb
2017-04-2517117000902ND
2017-04-2517117001102ND
2017-04-25171170012010.0876 ppb
2017-04-25171170009010.101 ppb
2017-04-25171170011010.0963 ppb
2017-04-25171170010013.22 ppb
2017-06-20171720016024.50 ppb
2017-06-20171720015025.00 ppb
2017-07-11171930027014.76 ppb
2017-07-11171930025015.07 ppb
2017-07-11171930026017.39 ppb
2017-08-28172420021013.34 ppb
2017-10-1117285000302ND
2017-10-11172850002010.263 ppb
2017-10-1117285000202ND
2017-10-11172850003010.0839 ppb
2017-10-11172850004010.137 ppb
2017-10-11172850001010.248 ppb
2018-02-2718060002801ND
2018-02-27180600027012.92 ppb
2018-02-27180600029010.222 ppb
2018-04-3018123005202ND
2018-04-30181230052010.337 ppb
2018-04-3018123005301ND
2018-04-30181230051021.84 ppb
2018-04-30181230051010.207 ppb
2018-05-22181440076017.26 ppb
2018-06-04181580019027.40 ppb
2018-06-04181580018023.00 ppb
2018-09-1018256004901ND
2018-09-10182560047012.86 ppb
2018-09-10182560048010.315 ppb
2018-10-101828400040211.2 ppb
2018-10-10182840002011.43 ppb
2018-10-101828400030112.7 ppb
2018-10-101828400040119.3 ppb
2019-01-16190170003014.83 ppb
2019-01-16190170005030.823 ppb
2019-01-161901700040112.3 ppb
2019-05-1319136000702ND
2019-05-1319136000901ND
2019-05-1319136000902ND
2019-05-1319136000701ND
2019-05-1319136000801ND
2019-07-15191980017015.49 ppb
2019-07-15191980015017.79 ppb
2019-07-15191980016010.388 ppb
2019-09-17192610012022.30 ppb
2019-09-19192610011027.40 ppb
2019-10-29193030007028.09 ppb
2019-10-29193030006027.57 ppb
2019-10-29193030006084.68 ppb
2019-10-29193030008010.190 ppb