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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Gardeau Water District

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.940 ppb220.630 ppb - 1.25 ppb
20150.435 ppb42ND - 1.23 ppb
20160.767 ppb32ND - 1.30 ppb
20170.835 ppb440.580 ppb - 0.990 ppb
20180.700 ppb32ND - 1.40 ppb
2019N/A00N/A

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
2014-08-3114P0175761.25 ppb
2014-11-29S4L0467-010.630 ppb
2015-02-1015P0020810.510 ppb
2015-05-14S5E1472THMND
2015-08-06S5H0678GARDTHM1.23 ppb
2015-11-05S5K062901THMND
2016-02-04S6B033001THMND
2016-08-11S6H0541-011.000 ppb
2016-11-10J6K0720-011.30 ppb
2017-02-02J7B0393-010.580 ppb
2017-05-04J7E0517-010.990 ppb
2017-08-10J7H1103-02THM0.940 ppb
2017-11-02J7K0487-010.830 ppb
2018-02-15J8B0990-01THMND
2018-05-03J8E034702THM0.700 ppb
2018-08-02R18072570021.40 ppb