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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Atwater

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.05 ppb127ND - 3.10 ppb
20150.414 ppb164ND - 2.80 ppb
20160.0575 ppb242ND - 0.770 ppb
20170.226 ppb164ND - 1.000 ppb
20180.152 ppb163ND - 0.870 ppb
20190.175 ppb243ND - 1.50 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-03-125806-902-09353.10 ppb
2014-03-125806-903-09101.90 ppb
2014-05-215806-900-0815ND
2014-05-215806-901-09300.760 ppb
2014-05-215806-902-10401.50 ppb
2014-05-215806-903-11251.90 ppb
2014-09-175806-900-0630ND
2014-09-175806-901-0800ND
2014-09-175806-902-07001.60 ppb
2014-09-175806-903-08301.80 ppb
2015-03-115806-900-10500.620 ppb
2015-03-115806-901-1120ND
2015-03-115806-902-10301.30 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
2015-09-225806-902-09301.90 ppb
2015-09-225806-903-1005ND
2015-12-075806-900-0700ND
2015-12-075806-901-0830ND
2015-12-075806-902-07452.80 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
2016-03-235806-902-0915ND
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
2016-10-065806-902-08000.770 ppb
2016-10-065806-903-1045ND
2016-12-065806-900-0920ND
2016-12-065806-901-1015ND
2016-12-065806-902-08400.610 ppb
2016-12-065806-903-1100ND
2017-03-085806-900-0721ND
2017-03-085806-901-0835ND
2017-03-085806-902-0755ND
2017-03-085806-903-0932ND
2017-05-095806-900-0945ND
2017-05-095806-901-0930ND
2017-05-095806-902-10000.860 ppb
2017-05-095806-903-1015ND
2017-09-125806-900-0830ND
2017-09-125806-901-0800ND
2017-09-125806-902-09150.940 ppb
2017-09-125806-903-0715ND
2017-12-055806-900-0825ND
2017-12-055806-901-0737ND
2017-12-055806-902-09130.810 ppb
2017-12-055806-903-10351.000 ppb
2018-03-205806-900-06300.720 ppb
2018-03-205806-901-0645ND
2018-03-205806-902-07000.870 ppb
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
2018-08-305806-902-08000.840 ppb
2018-08-305806-903-0830ND
2018-11-295806-900-0916ND
2018-11-295806-901-1129ND
2018-11-295806-902-1030ND
2018-11-295806-903-1203ND
2019-02-275806-013-1100ND
2019-02-275806-014-1130ND
2019-02-275806-015-0650ND
2019-02-275806-016-10201.50 ppb
2019-02-275806-017-0730ND
2019-02-275806-018-08201.50 ppb
2019-02-275806-019-0855ND
2019-02-275806-021-1155ND
2019-02-275806-900-0916ND
2019-02-275806-901-1129ND
2019-02-275806-902-1030ND
2019-02-275806-903-1203ND
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
2019-09-275806-902-10151.20 ppb
2019-09-275806-903-0915ND
2019-12-235806-901-0745ND
2019-12-235806-902-0830ND
2019-12-235806-903-0855ND
2019-12-235806-904-0810ND