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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Montgomery County MUD 7

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

77

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.65 ppb1614ND - 3.30 ppb
20151.68 ppb1611ND - 4.00 ppb
20162.08 ppb169ND - 7.60 ppb
20171.91 ppb1612ND - 5.90 ppb
20184.14 ppb16162.90 ppb - 7.20 ppb
20193.82 ppb1615ND - 7.80 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
2014-02-21AC441892.10 ppb
2014-02-21AC441932.10 ppb
2014-02-21AC441861.60 ppb
2014-02-21AC442482.50 ppb
2014-04-28AC518491.50 ppb
2014-04-28AC518541.60 ppb
2014-04-28AC51848ND
2014-04-28AC518571.50 ppb
2014-07-14AC595851.10 ppb
2014-07-14AC595983.00 ppb
2014-07-14AC596101.80 ppb
2014-07-14AC59586ND
2014-10-27AC705461.10 ppb
2014-10-27AC706022.20 ppb
2014-10-27AC705581.000 ppb
2014-10-27AC705453.30 ppb
2015-02-24AC816384.00 ppb
2015-02-24AC816513.30 ppb
2015-02-24AC816492.80 ppb
2015-02-24AC816503.90 ppb
2015-05-01AC902562.20 ppb
2015-05-01AC90235ND
2015-05-01AC90266ND
2015-05-01AC902901.10 ppb
2015-07-14AC99365ND
2015-07-14AC993611.40 ppb
2015-07-14AC99358ND
2015-07-14AC993632.40 ppb
2015-10-15AD107791.10 ppb
2015-10-15AD107752.50 ppb
2015-10-15AD10777ND
2015-10-15AD107972.10 ppb
2016-03-09AD278693.60 ppb
2016-03-09AD278677.60 ppb
2016-03-09AD278703.10 ppb
2016-03-09AD278663.40 ppb
2016-05-19AD374511.60 ppb
2016-05-19AD374413.40 ppb
2016-05-19AD374544.50 ppb
2016-05-19AD374463.90 ppb
2016-09-28AD51863ND
2016-09-28AD51867ND
2016-09-28AD518352.20 ppb
2016-09-29AD51973ND
2016-11-02AD56437ND
2016-11-02AD56434ND
2016-11-03AD56424ND
2016-11-03AD56425ND
2017-01-25AD66736ND
2017-01-25AD66735ND
2017-01-25AD66748ND
2017-03-09AD74335ND
2017-04-20AD803511.20 ppb
2017-04-20AD803571.50 ppb
2017-04-20AD803541.60 ppb
2017-04-20AD803351.10 ppb
2017-07-19AD898912.60 ppb
2017-07-19AD898822.10 ppb
2017-07-19AD898992.30 ppb
2017-07-19AD898832.40 ppb
2017-11-02AE034145.90 ppb
2017-11-02AE034002.90 ppb
2017-11-02AE034083.60 ppb
2017-11-02AE034063.40 ppb
2018-02-07AE127013.20 ppb
2018-02-07AE127073.50 ppb
2018-02-07AE126972.90 ppb
2018-02-07AE127043.40 ppb
2018-05-24AE276555.00 ppb
2018-05-24AE276685.30 ppb
2018-05-24AE276694.70 ppb
2018-05-24AE276933.50 ppb
2018-09-12AE397844.00 ppb
2018-09-12AE397934.80 ppb
2018-09-12AE397913.50 ppb
2018-09-12AE397797.20 ppb
2018-11-20AE466383.40 ppb
2018-11-20AE466363.70 ppb
2018-11-20AE466324.00 ppb
2018-11-20AE466304.20 ppb
2019-02-06AE531345.90 ppb
2019-02-06AE531357.80 ppb
2019-02-06AE531396.20 ppb
2019-02-06AE531367.20 ppb
2019-05-23AE679323.50 ppb
2019-05-23AE679233.00 ppb
2019-05-23AE679273.80 ppb
2019-05-23AE679264.30 ppb
2019-09-16AE835983.10 ppb
2019-09-16AE835972.00 ppb
2019-09-16AE835993.20 ppb
2019-09-16AE835903.20 ppb
2019-11-26AE90580ND
2019-11-26AE905762.60 ppb
2019-11-26AE905662.00 ppb
2019-11-26AE905783.30 ppb