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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Horn Lake

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

 

21

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0875 ppb121ND - 1.05 ppb
2015N/A00N/A
20160.440 ppb31ND - 1.32 ppb
2017ND20ND
2018ND20ND
20192.70 ppb221.53 ppb - 3.87 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
2014-01-13140114-010THND
2014-01-13140114-009THND
2014-01-13140114-008TH1.05 ppb
2014-01-13140114-007THND
2014-04-14140415-012THND
2014-04-14140415-011THND
2014-04-14140415-010THND
2014-04-14140415-009THND
2014-07-14140715-009THND
2014-07-14140715-011THND
2014-07-14140715-010THND
2014-07-14140715-008THND
2016-06-27160628-009THND
2016-12-01161202-032THND
2016-12-01161202-031TH1.32 ppb
2017-07-31170801-008THND
2017-07-31170801-007THND
2018-09-17180918-020THND
2018-09-17180918-019THND
2019-05-21190522-006TH1.53 ppb
2019-07-18190719-002TH3.87 ppb