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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Washington Aqueduct Division

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.

 

118

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND240ND
20130.0500 ppb242ND - 0.600 ppb
2014ND240ND
2015N/A00N/A
20160.0500 ppb242ND - 0.600 ppb
20170.0545 ppb221ND - 1.20 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
2012-01-01DalecarliaND
2012-01-01McMillanND
2012-02-01DalecarliaND
2012-02-01McMillanND
2012-03-01DalecarliaND
2012-03-01McMillanND
2012-04-01DalecarliaND
2012-04-01McMillanND
2012-05-01DalecarliaND
2012-05-01McMillanND
2012-06-01DalecarliaND
2012-06-01McMillanND
2012-07-01DalecarliaND
2012-07-01McMillanND
2012-08-01DalecarliaND
2012-08-01McMillanND
2012-09-01DalecarliaND
2012-09-01McMillanND
2012-10-01DalecarliaND
2012-10-01McMillanND
2012-11-01DalecarliaND
2012-11-01McMillanND
2012-12-01DalecarliaND
2012-12-01McMillanND
2013-01-01DalecarliaND
2013-01-01McMillanND
2013-02-01DalecarliaND
2013-02-01McMillanND
2013-03-01DalecarliaND
2013-03-01McMillanND
2013-04-01DalecarliaND
2013-04-01McMillanND
2013-05-01DalecarliaND
2013-05-01McMillanND
2013-06-01DalecarliaND
2013-06-01McMillanND
2013-07-01DalecarliaND
2013-07-01McMillanND
2013-08-01DalecarliaND
2013-08-01McMillanND
2013-09-01DalecarliaND
2013-09-01McMillan0.600 ppb
2013-10-01DalecarliaND
2013-10-01McMillan0.600 ppb
2013-11-01DalecarliaND
2013-11-01McMillanND
2013-12-01DalecarliaND
2013-12-01McMillanND
2014-01-01DalecarliaND
2014-01-01McMillanND
2014-02-01DalecarliaND
2014-02-01McMillanND
2014-03-01DalecarliaND
2014-03-01McMillanND
2014-04-01DalecarliaND
2014-04-01McMillanND
2014-05-01DalecarliaND
2014-05-01McMillanND
2014-06-01DalecarliaND
2014-06-01McMillanND
2014-07-01DalecarliaND
2014-07-01McMillanND
2014-08-01DalecarliaND
2014-08-01McMillanND
2014-09-01DalecarliaND
2014-09-01McMillanND
2014-10-01DalecarliaND
2014-10-01McMillanND
2014-11-01DalecarliaND
2014-11-01McMillanND
2014-12-01DalecarliaND
2014-12-01McMillanND
2016-01-01DalecarliaND
2016-01-01McMillanND
2016-02-01DalecarliaND
2016-02-01McMillanND
2016-03-01DalecarliaND
2016-03-01McMillanND
2016-04-01DalecarliaND
2016-04-01McMillanND
2016-05-01DalecarliaND
2016-05-01McMillanND
2016-06-01DalecarliaND
2016-06-01McMillanND
2016-07-01DalecarliaND
2016-07-01McMillanND
2016-08-01DalecarliaND
2016-08-01McMillanND
2016-09-01Dalecarlia0.600 ppb
2016-09-01McMillan0.600 ppb
2016-10-01DalecarliaND
2016-10-01McMillanND
2016-11-01DalecarliaND
2016-11-01McMillanND
2016-12-01DalecarliaND
2016-12-01McMillanND
2017-01-01DalecarliaND
2017-01-01McMillanND
2017-02-01DalecarliaND
2017-02-01McMillanND
2017-03-01DalecarliaND
2017-03-01McMillanND
2017-04-01DalecarliaND
2017-04-01McMillanND
2017-05-01DalecarliaND
2017-05-01McMillanND
2017-06-01DalecarliaND
2017-06-01McMillanND
2017-07-01DalecarliaND
2017-07-01McMillanND
2017-08-01DalecarliaND
2017-08-01McMillanND
2017-09-01DalecarliaND
2017-09-01McMillan1.20 ppb
2017-10-01DalecarliaND
2017-10-01McMillanND
2017-11-01DalecarliaND
2017-12-01DalecarliaND