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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Conroe

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

 

81

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.56 ppb98ND - 5.30 ppb
20150.992 ppb128ND - 2.70 ppb
20162.10 ppb129ND - 4.40 ppb
20172.09 ppb147ND - 11.0 ppb
20181.78 ppb2011ND - 8.80 ppb
20191.14 ppb148ND - 3.30 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
2014-04-09AC499495.30 ppb
2014-04-09AC499391.60 ppb
2014-04-09AC499410.500 ppb
2014-04-09AC499431.20 ppb
2014-05-28AC553371.000 ppb
2014-05-28AC553851.90 ppb
2014-05-28AC553841.20 ppb
2014-05-29AC55486ND
2014-05-29AC554901.30 ppb
2015-01-21AC77059ND
2015-01-21AC770532.70 ppb
2015-01-21AC770551.70 ppb
2015-01-21AC770490.700 ppb
2015-01-21AC770450.500 ppb
2015-01-21AC770512.70 ppb
2015-01-21AC77061ND
2015-01-21AC77057ND
2015-01-21AC77091ND
2015-01-21AC770470.900 ppb
2015-05-26AC932371.70 ppb
2015-05-26AC932421.000 ppb
2016-01-11AD173242.10 ppb
2016-01-11AD17316ND
2016-01-11AD173323.50 ppb
2016-01-11AD173462.50 ppb
2016-01-11AD173503.80 ppb
2016-01-11AD173141.80 ppb
2016-01-11AD173304.40 ppb
2016-01-11AD17312ND
2016-01-11AD173421.50 ppb
2016-01-11AD17318ND
2016-08-04AD470301.90 ppb
2016-08-04AD470413.70 ppb
2017-01-09AD63583ND
2017-01-09AD636117.80 ppb
2017-01-09AD63589ND
2017-04-11AD792362.10 ppb
2017-04-11AD7924011.0 ppb
2017-04-11AD792381.60 ppb
2017-05-18AD848313.20 ppb
2017-05-18AD848322.00 ppb
2017-05-18AD84885ND
2017-05-18AD84887ND
2017-05-18AD848911.60 ppb
2017-05-18AD84881ND
2017-05-18AD84883ND
2017-05-18AD84889ND
2018-01-10AE08671ND
2018-01-10AE086771.20 ppb
2018-01-10AE086751.000 ppb
2018-01-10AE08633ND
2018-01-10AE086351.60 ppb
2018-01-10AE08669ND
2018-01-10AE086791.30 ppb
2018-01-10AE086731.60 ppb
2018-01-10AE08691ND
2018-01-10AE08681ND
2018-03-08AE175932.10 ppb
2018-03-08AE17549ND
2018-05-08AE25595ND
2018-05-08AE255343.10 ppb
2018-05-08AE255353.80 ppb
2018-05-08AE255932.40 ppb
2018-07-02AE322178.60 ppb
2018-07-02AE32255ND
2018-10-01AE422478.80 ppb
2018-10-01AE42245ND
2019-03-11AE578611.70 ppb
2019-03-11AE578431.20 ppb
2019-03-11AE57851ND
2019-03-11AE578411.10 ppb
2019-03-11AE57839ND
2019-03-11AE57865ND
2019-04-08AE614283.30 ppb
2019-04-08AE61442ND
2019-04-08AE614241.20 ppb
2019-04-08AE614222.10 ppb
2019-04-08AE61426ND
2019-06-20AE714422.90 ppb
2019-06-20AE714472.40 ppb
2019-10-15AE86661ND