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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Conroe

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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)

51

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.778 ppb97ND - 2.90 ppb
20150.575 ppb124ND - 3.30 ppb
20165.33 ppb1210ND - 20.0 ppb
20173.77 ppb149ND - 15.0 ppb
20182.19 ppb2011ND - 7.70 ppb
20192.66 ppb1410ND - 7.40 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-04-09AC499492.90 ppb
2014-04-09AC499390.500 ppb
2014-04-09AC49941ND
2014-04-09AC499430.700 ppb
2014-05-28AC553370.700 ppb
2014-05-28AC553851.000 ppb
2014-05-28AC55384ND
2014-05-29AC554860.700 ppb
2014-05-29AC554900.500 ppb
2015-01-21AC77059ND
2015-01-21AC770533.30 ppb
2015-01-21AC77055ND
2015-01-21AC77049ND
2015-01-21AC770450.600 ppb
2015-01-21AC77051ND
2015-01-21AC77061ND
2015-01-21AC77057ND
2015-01-21AC77091ND
2015-01-21AC770471.80 ppb
2015-05-26AC932371.20 ppb
2015-05-26AC93242ND
2016-01-11AD1732420.0 ppb
2016-01-11AD17316ND
2016-01-11AD173322.80 ppb
2016-01-11AD173462.50 ppb
2016-01-11AD173502.00 ppb
2016-01-11AD173141.80 ppb
2016-01-11AD173308.60 ppb
2016-01-11AD173128.70 ppb
2016-01-11AD17342ND
2016-01-11AD173189.70 ppb
2016-08-04AD470304.50 ppb
2016-08-04AD470413.40 ppb
2017-01-09AD6358311.0 ppb
2017-01-09AD636112.60 ppb
2017-01-09AD635899.20 ppb
2017-04-11AD79236ND
2017-04-11AD792406.40 ppb
2017-04-11AD79238ND
2017-05-18AD848312.50 ppb
2017-05-18AD84832ND
2017-05-18AD848851.80 ppb
2017-05-18AD8488715.0 ppb
2017-05-18AD848912.50 ppb
2017-05-18AD848811.80 ppb
2017-05-18AD84883ND
2017-05-18AD84889ND
2018-01-10AE086716.60 ppb
2018-01-10AE08677ND
2018-01-10AE08675ND
2018-01-10AE086334.70 ppb
2018-01-10AE08635ND
2018-01-10AE08669ND
2018-01-10AE086791.20 ppb
2018-01-10AE08673ND
2018-01-10AE086917.70 ppb
2018-01-10AE086816.90 ppb
2018-03-08AE175931.60 ppb
2018-03-08AE17549ND
2018-05-08AE25595ND
2018-05-08AE255341.90 ppb
2018-05-08AE255354.90 ppb
2018-05-08AE255931.50 ppb
2018-07-02AE322172.90 ppb
2018-07-02AE32255ND
2018-10-01AE422473.80 ppb
2018-10-01AE42245ND
2019-03-11AE578615.80 ppb
2019-03-11AE578432.20 ppb
2019-03-11AE578511.000 ppb
2019-03-11AE578417.40 ppb
2019-03-11AE578397.00 ppb
2019-03-11AE578655.30 ppb
2019-04-08AE614281.000 ppb
2019-04-08AE61442ND
2019-04-08AE61424ND
2019-04-08AE614223.60 ppb
2019-04-08AE61426ND
2019-06-20AE714422.10 ppb
2019-06-20AE714471.90 ppb
2019-10-15AE86661ND