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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Wilmington

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.

 

62

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.991 ppb169ND - 4.90 ppb
20130.841 ppb146ND - 2.85 ppb
20140.600 ppb83ND - 1.89 ppb
20150.532 ppb84ND - 1.48 ppb
20160.319 ppb82ND - 1.37 ppb
20170.911 ppb83ND - 3.37 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
2012-02-022020421-01ND
2012-02-022020421-03ND
2012-02-022020421-04ND
2012-02-022020421-02ND
2012-04-192042621-020.620 ppb
2012-04-192042621-03ND
2012-04-192042621-01ND
2012-04-192042621-04ND
2012-09-122091795-013.70 ppb
2012-09-122091795-021.60 ppb
2012-09-122091795-034.90 ppb
2012-09-122091795-040.870 ppb
2012-11-142112260-031.10 ppb
2012-11-142112260-040.760 ppb
2012-11-142112260-011.20 ppb
2012-11-142112260-021.10 ppb
2013-01-163012414-01ND
2013-01-163012414-04ND
2013-01-163012414-03ND
2013-01-163012414-02ND
2013-05-013050373-04ND
2013-05-013050373-01ND
2013-05-013050373-02ND
2013-05-013050373-03ND
2013-09-263093691-042.85 ppb
2013-09-263093691-022.27 ppb
2013-09-263093691-011.92 ppb
2013-09-263093691-031.92 ppb
2013-11-073111171-011.28 ppb
2013-11-073111171-021.54 ppb
2014-02-124021691-021.82 ppb
2014-02-124021691-011.89 ppb
2014-05-154052409-02ND
2014-05-154052409-01ND
2014-08-264084824-021.09 ppb
2014-08-264084824-01ND
2014-11-134111913-01ND
2014-11-134111913-02ND
2015-02-055020856-01ND
2015-02-055020856-02ND
2015-05-145052314-02ND
2015-05-145052314-01ND
2015-08-135082650-011.48 ppb
2015-08-135082650-020.527 ppb
2015-11-115112059-020.996 ppb
2015-11-125112059-011.25 ppb
2016-02-116021987-02ND
2016-02-116021987-01ND
2016-05-116052024-02ND
2016-05-116052024-01ND
2016-08-036081037-021.37 ppb
2016-08-036081037-011.18 ppb
2016-11-026110815-01ND
2016-11-026110815-02ND
2017-02-017020483-02ND
2017-02-017020483-01ND
2017-05-037050978-02ND
2017-05-037050978-01ND
2017-08-177083655-013.31 ppb
2017-08-177083655-023.37 ppb
2017-11-087112003-01ND
2017-11-087112003-020.609 ppb