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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Harris County MUD 157

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.73 ppb330.700 ppb - 2.30 ppb
20151.62 ppb1612ND - 3.50 ppb
20161.73 ppb1817ND - 3.40 ppb
20171.37 ppb1914ND - 3.00 ppb
20181.22 ppb1814ND - 2.30 ppb
20191.13 ppb1813ND - 2.60 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
2014-06-16AC569592.20 ppb
2014-06-16AC569582.30 ppb
2014-08-07AC625560.700 ppb
2015-05-15AC922612.50 ppb
2015-05-15AC922911.30 ppb
2015-05-15AC922602.20 ppb
2015-05-15AC922502.10 ppb
2015-05-15AC923461.80 ppb
2015-05-15AC923501.70 ppb
2015-07-28AD01206ND
2015-07-28AD01200ND
2015-07-28AD012292.60 ppb
2015-07-28AD012042.20 ppb
2015-09-29AD089951.60 ppb
2015-12-07AD157941.70 ppb
2015-12-07AD15685ND
2015-12-07AD15712ND
2015-12-07AD157092.70 ppb
2015-12-07AD157113.50 ppb
2016-02-11AD233331.50 ppb
2016-02-11AD23387ND
2016-02-11AD233791.20 ppb
2016-02-11AD233282.30 ppb
2016-02-11AD233321.60 ppb
2016-02-11AD233311.60 ppb
2016-04-27AD344071.50 ppb
2016-04-27AD344011.70 ppb
2016-04-27AD344083.40 ppb
2016-04-27AD344091.60 ppb
2016-09-16AD499811.90 ppb
2016-09-16AD499762.80 ppb
2016-09-16AD499781.000 ppb
2016-09-16AD500051.30 ppb
2016-11-18AD587872.10 ppb
2016-11-18AD587851.70 ppb
2016-11-18AD587841.60 ppb
2016-11-18AD587832.30 ppb
2017-02-15AD708252.10 ppb
2017-02-15AD708272.50 ppb
2017-02-15AD708222.60 ppb
2017-02-15AD708291.20 ppb
2017-03-14AD749451.20 ppb
2017-03-14AD74883ND
2017-05-17AD846231.50 ppb
2017-05-17AD846241.80 ppb
2017-05-17AD846312.50 ppb
2017-05-17AD846301.10 ppb
2017-08-16AD931921.50 ppb
2017-08-16AD931931.000 ppb
2017-08-16AD931942.60 ppb
2017-08-16AD93195ND
2017-10-24AE017791.50 ppb
2017-10-24AE01777ND
2017-10-24AE017613.00 ppb
2017-10-24AE01775ND
2017-12-15AE07852ND
2018-02-05AE121741.90 ppb
2018-02-05AE121641.30 ppb
2018-02-05AE121432.00 ppb
2018-02-05AE121381.10 ppb
2018-03-28AE204191.60 ppb
2018-03-28AE20383ND
2018-05-03AE250371.30 ppb
2018-05-03AE250321.10 ppb
2018-05-03AE250332.30 ppb
2018-05-03AE250381.40 ppb
2018-08-22AE380652.20 ppb
2018-08-22AE380671.50 ppb
2018-08-22AE38064ND
2018-08-22AE380631.20 ppb
2018-11-19AE46444ND
2018-11-19AE46449ND
2018-11-19AE464461.90 ppb
2018-11-19AE464671.20 ppb
2019-02-20AE55007ND
2019-02-20AE550911.10 ppb
2019-02-20AE550041.60 ppb
2019-02-20AE55008ND
2019-02-20AE550091.30 ppb
2019-06-05AE692411.70 ppb
2019-06-05AE69240ND
2019-06-05AE692382.00 ppb
2019-06-05AE692391.30 ppb
2019-08-14AE785871.40 ppb
2019-08-14AE785841.000 ppb
2019-08-14AE785882.20 ppb
2019-08-14AE78585ND
2019-10-02AE855021.30 ppb
2019-10-02AE855032.60 ppb
2019-10-02AE85501ND
2019-10-02AE854981.60 ppb
2019-12-19AE928851.30 ppb