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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Atwater

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

 

108

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.169 ppb122ND - 1.50 ppb
20150.120 ppb162ND - 1.30 ppb
20160.0504 ppb242ND - 0.610 ppb
20170.0419 ppb161ND - 0.670 ppb
20180.114 ppb162ND - 1.000 ppb
20190.155 ppb246ND - 0.740 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
2014-03-125806-900-0735ND
2014-03-125806-901-0815ND
2014-03-125806-902-09351.50 ppb
2014-03-125806-903-09100.530 ppb
2014-05-215806-900-0815ND
2014-05-215806-901-0930ND
2014-05-215806-902-1040ND
2014-05-215806-903-1125ND
2014-09-175806-900-0630ND
2014-09-175806-901-0800ND
2014-09-175806-902-0700ND
2014-09-175806-903-0830ND
2015-03-115806-900-1050ND
2015-03-115806-901-1120ND
2015-03-115806-902-10300.620 ppb
2015-03-115806-903-1145ND
2015-06-165806-900-1030ND
2015-06-165806-901-1000ND
2015-06-165806-902-1100ND
2015-06-165806-903-0930ND
2015-09-225806-900-0728ND
2015-09-225806-901-0820ND
2015-09-225806-902-0930ND
2015-09-225806-903-1005ND
2015-12-075806-900-0700ND
2015-12-075806-901-0830ND
2015-12-075806-902-07451.30 ppb
2015-12-075806-903-0915ND
2016-03-235806-013-0630ND
2016-03-235806-014-0700ND
2016-03-235806-015-0730ND
2016-03-235806-016-0800ND
2016-03-235806-017-0830ND
2016-03-235806-018-0900ND
2016-03-235806-019-0930ND
2016-03-235806-021-1000ND
2016-03-235806-900-0830ND
2016-03-235806-901-1000ND
2016-03-235806-902-09150.610 ppb
2016-03-235806-903-1100ND
2016-06-225806-900-0715ND
2016-06-225806-901-0930ND
2016-06-225806-902-0800ND
2016-06-225806-903-0845ND
2016-10-065806-900-0945ND
2016-10-065806-901-1015ND
2016-10-065806-902-0800ND
2016-10-065806-903-1045ND
2016-12-065806-900-0920ND
2016-12-065806-901-1015ND
2016-12-065806-902-08400.600 ppb
2016-12-065806-903-1100ND
2017-03-085806-900-0721ND
2017-03-085806-901-0835ND
2017-03-085806-902-07550.670 ppb
2017-03-085806-903-0932ND
2017-05-095806-900-0945ND
2017-05-095806-901-0930ND
2017-05-095806-902-1000ND
2017-05-095806-903-1015ND
2017-09-125806-900-0830ND
2017-09-125806-901-0800ND
2017-09-125806-902-0915ND
2017-09-125806-903-0715ND
2017-12-055806-900-0825ND
2017-12-055806-901-0737ND
2017-12-055806-902-0913ND
2017-12-055806-903-1035ND
2018-03-205806-900-0630ND
2018-03-205806-901-0645ND
2018-03-205806-902-0700ND
2018-03-205806-903-0715ND
2018-05-165806-900-0630ND
2018-05-165806-901-0645ND
2018-05-165806-902-0700ND
2018-05-165806-903-0715ND
2018-08-305806-900-0700ND
2018-08-305806-901-0730ND
2018-08-305806-902-08001.000 ppb
2018-08-305806-903-0830ND
2018-11-295806-900-0916ND
2018-11-295806-901-1129ND
2018-11-295806-902-10300.820 ppb
2018-11-295806-903-1203ND
2019-02-275806-013-1100ND
2019-02-275806-014-1130ND
2019-02-275806-015-0650ND
2019-02-275806-016-1020ND
2019-02-275806-017-0730ND
2019-02-275806-018-08200.590 ppb
2019-02-275806-019-0855ND
2019-02-275806-021-1155ND
2019-02-275806-900-0916ND
2019-02-275806-901-1129ND
2019-02-275806-902-10300.580 ppb
2019-02-275806-903-12030.620 ppb
2019-06-195806-900-0750ND
2019-06-195806-901-0715ND
2019-06-195806-902-0820ND
2019-06-195806-903-0900ND
2019-09-275806-900-0945ND
2019-09-275806-901-0845ND
2019-09-275806-902-10150.640 ppb
2019-09-275806-903-0915ND
2019-12-235806-901-0745ND
2019-12-235806-902-08300.740 ppb
2019-12-235806-903-0855ND
2019-12-235806-904-08100.560 ppb