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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Shelby

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.918 ppb1612ND - 1.60 ppb
20151.16 ppb166ND - 4.70 ppb
2016ND170ND
20170.538 ppb167ND - 1.60 ppb
20180.700 ppb169ND - 1.50 ppb
20190.788 ppb1610ND - 1.50 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
2014-01-0692185663002ND
2014-01-0692185663001ND
2014-01-06921856630040.690 ppb
2014-01-0692185663003ND
2014-04-0192195772001DIS1.10 ppb
2014-04-0192195772004DISND
2014-04-0192195772002DIS1.40 ppb
2014-04-0192195772003DIS1.000 ppb
2014-07-0892208482001DIS1.20 ppb
2014-07-0892208482002DIS1.30 ppb
2014-07-0892208482003DIS1.50 ppb
2014-07-0892208482004DIS1.20 ppb
2014-10-0192219526001TTH1.40 ppb
2014-10-0192219526002TTH1.20 ppb
2014-10-0192219526003TTH1.60 ppb
2014-10-0192219526004TTH1.10 ppb
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-04-01ND
2015-04-01ND
2015-04-01ND
2015-04-01ND
2015-07-073.40 ppb
2015-07-073.30 ppb
2015-07-074.70 ppb
2015-07-074.10 ppb
2015-10-061.60 ppb
2015-10-061.40 ppb
2015-10-06ND
2015-10-06ND
2016-01-1192282574006TTHND
2016-01-1192282574008TTHND
2016-01-1192282574007TTHND
2016-01-1192282574005TTHND
2016-04-1192293656004TTHND
2016-04-1192293656003TTHND
2016-04-1192293656001TTHND
2016-04-1292293656002TTHND
2016-07-1292305245004TTHND
2016-07-1292305245003TTHND
2016-07-1292305245002TTHND
2016-07-1292305245001TTHND
2016-10-0492314962001TTHND
2016-10-0492314962002TTHND
2016-10-0492314962003TTHND
2016-10-0492314962004TTHND
2016-10-0592314962007DISND
2017-01-0592325484003TTHND
2017-01-0592325484002TTHND
2017-01-0592325484001TTHND
2017-01-0592325484004TTHND
2017-04-0492336010003TTHND
2017-04-0492336010004TTHND
2017-04-0492336010002TTHND
2017-04-0492336010001TTHND
2017-07-1192347401006TTH1.60 ppb
2017-07-1192347401005TTH1.20 ppb
2017-07-1192347401004TTH1.40 ppb
2017-07-1192347401003TTHND
2017-10-0392357755001TTH1.10 ppb
2017-10-0392357755002TTH1.000 ppb
2017-10-0392357755003TTH1.000 ppb
2017-10-0392357755004TTH1.30 ppb
2018-01-0292368710004TTH ND
2018-01-0292368710003TTH ND
2018-01-0292368710002TTH ND
2018-01-0292368710001TTH ND
2018-04-0392379544004TTH ND
2018-04-0392379544001TTH ND
2018-04-0392379544002TTH ND
2018-04-0392379544003TTH 1.000 ppb
2018-07-1092391762004TTH 1.40 ppb
2018-07-1092391762003TTH 1.40 ppb
2018-07-1092391762002TTH 1.50 ppb
2018-07-1092391762001TTH 1.10 ppb
2018-10-0292402002003TTH 1.30 ppb
2018-10-0292402002004TTH 1.10 ppb
2018-10-0292402002005TTH 1.000 ppb
2018-10-0292402002006TTH 1.40 ppb
2019-01-0892413390001_3770ND
2019-01-0892413390002_3770ND
2019-01-0892413390003_3770ND
2019-01-0892413390004_3770ND
2019-04-0392423845001_37701.50 ppb
2019-04-0392423845004_3770ND
2019-04-0392423845003_37701.10 ppb
2019-04-0392423845002_37701.10 ppb
2019-07-0992436239002_12711.10 ppb
2019-07-0992436239004_12711.40 ppb
2019-07-0992436239003_12711.50 ppb
2019-07-0992436239001_12711.20 ppb
2019-10-0192447962004_37701.40 ppb
2019-10-0192447962003_37701.10 ppb
2019-10-0192447962002_3770ND
2019-10-0192447962001_37701.20 ppb