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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Sleepy Valley Water Company

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.60 ppb221.60 ppb
2013ND20ND
20142.80 ppb222.70 ppb - 2.90 ppb
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-07-125867-001-06111.60 ppb
2012-07-125867-002-06221.60 ppb
2013-07-125867-001-0606ND
2013-07-125867-002-0622ND
2014-07-025867-001-07262.90 ppb
2014-07-025867-002-07292.70 ppb
2015-06-265867-001-0710ND
2015-06-265867-002-0725ND
2016-06-285867-001-0920ND
2016-06-285867-002-0930ND
2017-07-265867-001-1100ND
2017-07-265867-002-1110ND