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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Sa#16 Sumner Hill-water System

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND30ND
2017ND50ND
2018ND40ND
2019ND60ND

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
2014-01-225802-900-1015ND
2014-04-255802-900-1100ND
2014-07-025802-900-0830ND
2014-10-035802-900-0910ND
2015-01-065802-900-1011ND
2015-04-225802-900-1152ND
2015-06-225802-900-1135ND
2015-09-165802-900-1000ND
2016-06-165802-900-1200ND
2016-09-235802-900-1200ND
2016-12-155802-900-1210ND
2017-02-275802-900-1012ND
2017-05-025802-900-0930ND
2017-07-125802-900-1015ND
2017-10-055802-900-1152ND
2017-12-185802-900-1026ND
2018-01-165802-900-1055ND
2018-04-185802-900-0935ND
2018-07-115802-900-1000ND
2018-12-125802-900-1315ND
2019-03-205802-900-1150ND
2019-06-115802-900-0939ND
2019-08-265802-003-1107ND
2019-09-035802-900-1017ND
2019-10-305802-900-1123ND
2019-11-185802-900-0958ND