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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Covington Water Supply

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

 

54

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.17 ppb3226ND - 3.20 ppb
20151.80 ppb441.70 ppb - 1.90 ppb
20161.49 ppb440.680 ppb - 2.30 ppb
20171.50 ppb64ND - 2.30 ppb
20182.10 ppb441.90 ppb - 2.30 ppb
20191.35 ppb42ND - 2.70 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
2014-02-27680-99061-32.40 ppb
2014-02-27680-99061-12.80 ppb
2014-02-27680-99061-20.750 ppb
2014-02-27680-99061-32.40 ppb
2014-02-27680-99061-40.960 ppb
2014-02-27680-99061-20.750 ppb
2014-02-27680-99061-12.80 ppb
2014-02-27680-99061-40.960 ppb
2014-03-10AD89628ND
2014-03-10AD89624ND
2014-03-10AD89625ND
2014-03-10AD89628ND
2014-03-10AD89625ND
2014-03-10AD89624ND
2014-05-28680-101839-12.20 ppb
2014-05-28680-101839-20.450 ppb
2014-05-28680-101839-30.290 ppb
2014-05-28680-101839-40.730 ppb
2014-05-28680-101839-12.20 ppb
2014-05-28680-101839-20.450 ppb
2014-05-28680-101839-30.290 ppb
2014-05-28680-101839-40.730 ppb
2014-08-19680-104449-133.20 ppb
2014-08-19680-104449-142.10 ppb
2014-08-19680-104449-133.20 ppb
2014-08-19680-104449-121.80 ppb
2014-08-19680-104449-110.700 ppb
2014-08-19680-104449-110.700 ppb
2014-08-19680-104449-121.80 ppb
2014-08-19680-104449-142.10 ppb
2014-11-18680-107457-10.320 ppb
2014-11-18680-107457-10.320 ppb
2015-02-11680-109932-51.90 ppb
2015-02-11680-109932-51.90 ppb
2015-11-10680-118909-51.70 ppb
2015-11-10680-118909-51.70 ppb
2016-02-15680-121964-12.30 ppb
2016-02-15680-121964-12.30 ppb
2016-11-10680-132049-10.680 ppb
2016-11-10680-132049-10.680 ppb
2017-02-09352945210362.30 ppb
2017-02-09352945210362.30 ppb
2017-11-0135345858002ND
2017-11-01353458580012.20 ppb
2017-11-01353458580012.20 ppb
2017-11-0135345858002ND
2018-02-16353748630011.90 ppb
2018-02-16353748630011.90 ppb
2018-11-09354304300012.30 ppb
2018-11-09354304300012.30 ppb
2019-02-21354500310012.70 ppb
2019-02-21354500310012.70 ppb
2019-11-0635510428001ND
2019-11-0635510428001ND