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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Atascosa Rural WSC

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

 

113

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.900 ppb1812ND - 2.90 ppb
20150.811 ppb1811ND - 1.80 ppb
20161.08 ppb1811ND - 4.20 ppb
20170.480 ppb205ND - 4.00 ppb
20180.265 ppb205ND - 1.20 ppb
20190.726 ppb1910ND - 2.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-02-12AC42474ND
2014-02-12AC424551.000 ppb
2014-02-12AC424521.10 ppb
2014-02-12AC42465ND
2014-02-12AC424641.000 ppb
2014-03-27AC48533ND
2014-04-16AC508031.10 ppb
2014-04-16AC508061.10 ppb
2014-04-16AC508041.000 ppb
2014-04-16AC508051.30 ppb
2014-07-21AC603641.50 ppb
2014-07-21AC603651.50 ppb
2014-07-21AC603631.000 ppb
2014-07-21AC603621.70 ppb
2014-10-15AC697742.90 ppb
2014-10-15AC69782ND
2014-10-15AC69773ND
2014-10-15AC69775ND
2015-02-05AC79472ND
2015-02-05AC79470ND
2015-02-05AC79427ND
2015-02-05AC794311.000 ppb
2015-02-05AC79459ND
2015-02-05AC79430ND
2015-06-02AC942811.80 ppb
2015-06-02AC942791.10 ppb
2015-06-02AC942821.10 ppb
2015-06-02AC942701.30 ppb
2015-08-10AD032001.10 ppb
2015-08-10AD032091.40 ppb
2015-08-10AD032071.40 ppb
2015-08-10AD03206ND
2015-10-06AD095941.20 ppb
2015-10-06AD095971.50 ppb
2015-10-06AD095771.70 ppb
2015-10-06AD09595ND
2016-02-16AD23667ND
2016-02-16AD23635ND
2016-02-16AD23605ND
2016-02-16AD236041.40 ppb
2016-02-16AD23606ND
2016-02-16AD23602ND
2016-04-26AD341524.20 ppb
2016-04-26AD341681.50 ppb
2016-04-26AD341701.30 ppb
2016-04-26AD341711.20 ppb
2016-07-13AD440241.30 ppb
2016-07-13AD44023ND
2016-07-13AD440031.50 ppb
2016-07-13AD44008ND
2016-10-10AD528081.60 ppb
2016-10-10AD528092.50 ppb
2016-10-10AD528111.70 ppb
2016-10-10AD528041.20 ppb
2017-01-12AD64758ND
2017-01-12AD64790ND
2017-01-12AD64724ND
2017-01-12AD64703ND
2017-01-12AD647001.10 ppb
2017-01-12AD64699ND
2017-04-06AD78718ND
2017-04-06AD787191.80 ppb
2017-04-06AD78720ND
2017-04-06AD78721ND
2017-07-18AD899441.10 ppb
2017-07-18AD89939ND
2017-07-18AD89940ND
2017-07-18AD89935ND
2017-08-09AD92562ND
2017-10-06AD997544.00 ppb
2017-10-06AD99751ND
2017-10-06AD997531.60 ppb
2017-10-06AD99752ND
2017-10-06AD99826ND
2018-01-18AE09251ND
2018-01-18AE09255ND
2018-01-18AE09253ND
2018-01-18AE09229ND
2018-01-18AE09221ND
2018-01-18AE09210ND
2018-01-18AE09215ND
2018-04-06AE21722ND
2018-04-06AE216801.10 ppb
2018-04-06AE21679ND
2018-04-06AE216781.20 ppb
2018-04-06AE216771.000 ppb
2018-08-01AE35273ND
2018-08-01AE35274ND
2018-08-01AE352761.000 ppb
2018-08-01AE35275ND
2018-10-04AE42677ND
2018-10-04AE42679ND
2018-10-04AE426761.000 ppb
2018-10-04AE42678ND
2019-01-11AE49573ND
2019-01-11AE49571ND
2019-01-11AE49569ND
2019-03-05AE571111.30 ppb
2019-03-05AE57110ND
2019-03-05AE571081.20 ppb
2019-03-05AE57109ND
2019-04-04AE611701.20 ppb
2019-04-04AE61171ND
2019-04-04AE611691.50 ppb
2019-04-04AE61172ND
2019-07-10AE741281.70 ppb
2019-07-10AE741331.000 ppb
2019-07-10AE741322.00 ppb
2019-07-10AE741291.50 ppb
2019-10-01AE85330ND
2019-10-01AE85329ND
2019-10-01AE853271.30 ppb
2019-10-01AE853321.10 ppb