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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Houston Waterworks

NOTE: Houston Waterworks purchases water from Perryville which is required to test for bromoform. Sample information shown below was taken by Perryville.

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

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND80ND

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

NOTE: Houston Waterworks purchases water from Perryville which is required to test for bromoform. Sample information shown below was taken by Perryville.

Date Lab ID Result
2014-02-0514037001502ND
2014-02-0514037001602ND
2014-04-1414107011602ND
2014-04-1414107011502ND
2014-07-2314205014602ND
2014-07-2314205014502ND
2014-08-2614240004701ND
2014-11-1014316003002ND
2014-11-1014316003102ND
2015-02-0915043003002ND
2015-02-0915043002902ND
2015-05-1115134004302ND
2015-05-1215134004202ND
2015-07-2715209000202ND
2015-07-2715209000102ND
2015-08-2615238004409ND
2015-10-2615302006902ND
2015-10-2615302006802ND
2016-02-1016042009502ND
2016-02-1016042009602ND
2016-05-0916133007702ND
2016-08-0816223006701ND
2016-08-0816223009202ND
2016-08-0816223009102ND
2016-10-2516300001902ND
2016-10-2516300002002ND
2017-01-3017033007802ND
2017-01-3017033007902ND
2017-05-0817131002502ND
2017-05-0817131002802ND
2017-08-0917222011502ND
2017-08-0917222011702ND
2017-08-0917222011601ND
2017-11-0617313008702ND
2017-11-0617313009002ND
2018-02-0518039010102ND
2018-02-0518039009802ND
2018-04-3018122001102ND
2018-04-3018122001602ND
2018-07-1618200009109ND
2018-08-0618220003902ND
2018-08-0618220004402ND
2018-10-2918304003802ND
2018-10-2918304003702ND
2019-01-3019031011102ND
2019-01-3019031011002ND
2019-04-2419115012302ND
2019-04-2419115012402ND
2019-07-2319206008701ND
2019-07-2319206008801ND
2019-08-2719241001902ND
2019-10-2119295000102ND
2019-10-2119295000502ND