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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Montgomery Trace Water System

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

 

107

Samples

0

Samples exceeding legal limit (MCL)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.600 ppb21ND - 1.20 ppb
2015ND170ND
20160.700 ppb217ND - 3.10 ppb
20170.743 ppb214ND - 8.70 ppb
20183.20 ppb238ND - 61.0 ppb
20190.643 ppb239ND - 2.10 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
2014-06-25AC580041.20 ppb
2014-06-25AC58039ND
2015-03-31AC86757ND
2015-03-31AC86797ND
2015-03-31AC86777ND
2015-05-29AC93865ND
2015-05-29AC93869ND
2015-05-29AC94012ND
2015-05-29AC94021ND
2015-05-29AC94014ND
2015-05-29AC93987ND
2015-07-23AD00890ND
2015-07-23AD00860ND
2015-07-23AD00887ND
2015-07-23AD00863ND
2015-10-13AD10457ND
2015-10-13AD10451ND
2015-10-13AD10454ND
2015-10-13AD10456ND
2016-01-11AD173542.00 ppb
2016-01-11AD17356ND
2016-01-11AD17340ND
2016-01-11AD17336ND
2016-01-11AD17344ND
2016-01-11AD173072.40 ppb
2016-01-11AD173103.10 ppb
2016-01-11AD17308ND
2016-01-11AD173092.60 ppb
2016-06-20AD41140ND
2016-06-20AD411282.00 ppb
2016-06-20AD41130ND
2016-06-20AD41129ND
2016-07-27AD45922ND
2016-07-27AD459231.60 ppb
2016-07-27AD45924ND
2016-07-27AD45927ND
2016-12-12AD61600ND
2016-12-12AD61601ND
2016-12-12AD616031.000 ppb
2016-12-12AD61599ND
2017-01-23AD66120ND
2017-01-23AD66118ND
2017-01-23AD661104.30 ppb
2017-01-23AD661008.70 ppb
2017-01-23AD66116ND
2017-01-23AD66025ND
2017-01-23AD66021ND
2017-01-23AD66022ND
2017-01-23AD66023ND
2017-05-17AD84593ND
2017-05-17AD845941.20 ppb
2017-05-17AD84601ND
2017-05-17AD84596ND
2017-07-13AD89194ND
2017-07-13AD89202ND
2017-07-13AD89193ND
2017-07-13AD89201ND
2017-11-29AE06099ND
2017-11-29AE060981.40 ppb
2017-11-29AE06097ND
2017-11-29AE06100ND
2018-02-20AE144351.10 ppb
2018-02-20AE14441ND
2018-02-20AE14439ND
2018-02-20AE14437ND
2018-02-20AE1443161.0 ppb
2018-02-20AE14373ND
2018-02-20AE143991.60 ppb
2018-02-20AE14386ND
2018-02-20AE14377ND
2018-06-14AE30004ND
2018-06-14AE299981.30 ppb
2018-06-14AE30005ND
2018-06-14AE30010ND
2018-08-23AE38396ND
2018-08-23AE383761.90 ppb
2018-08-23AE38375ND
2018-08-23AE38398ND
2018-09-11AE396102.50 ppb
2018-11-05AE45237ND
2018-11-05AE452362.70 ppb
2018-11-05AE45234ND
2018-11-05AE45235ND
2018-11-05AE452531.50 ppb
2019-01-16AE501381.40 ppb
2019-01-16AE50134ND
2019-01-16AE50146ND
2019-01-16AE50172ND
2019-01-16AE50174ND
2019-01-16AE50130ND
2019-01-16AE50076ND
2019-01-16AE500781.40 ppb
2019-01-16AE50089ND
2019-01-16AE50077ND
2019-04-16AE625741.30 ppb
2019-04-16AE62535ND
2019-04-16AE62533ND
2019-04-16AE62534ND
2019-04-16AE62536ND
2019-07-01AE728301.10 ppb
2019-07-01AE728291.90 ppb
2019-07-01AE72827ND
2019-07-01AE72828ND
2019-10-17AE868961.50 ppb
2019-10-17AE868992.10 ppb
2019-10-17AE868982.00 ppb
2019-10-17AE868952.10 ppb