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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Rincon Water Consumers Co-op

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20151.16 ppb220.928 ppb - 1.40 ppb
20160.345 ppb21ND - 0.689 ppb
2017ND20ND
20180.271 ppb21ND - 0.542 ppb
2019ND20ND

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
2015-08-2020150260141.40 ppb
2015-09-161509882-001A0.928 ppb
2016-08-121608909-001A0.689 ppb
2016-09-091609618-001AND
2017-08-151708A56-001ND
2017-09-131709865-001ND
2018-08-131808766-001ND
2018-09-121809773-0010.542 ppb
2019-08-131908808-001ND
2019-09-031909376-001ND