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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Cairo

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

 

103

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.124 ppb172ND - 1.10 ppb
20160.456 ppb165ND - 1.80 ppb
20170.130 ppb202ND - 1.40 ppb
20180.0647 ppb171ND - 1.10 ppb
20190.0541 ppb171ND - 0.920 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
2014-02-18AI28195ND
2014-02-18AI28196ND
2014-02-18AI28197ND
2014-02-18AI28198ND
2014-05-20AI40985ND
2014-05-20AI40986ND
2014-05-20AI40987ND
2014-05-20AI40988ND
2014-08-19AI50385ND
2014-08-19AI50386ND
2014-08-19AI50387ND
2014-08-19AI50388ND
2014-11-18AI59783ND
2014-11-18AI59784ND
2014-11-18AI59785ND
2014-11-18AI59786ND
2015-02-17AI65089ND
2015-02-17AI65090ND
2015-02-17AI65091ND
2015-02-17AI65092ND
2015-05-19AI775181.10 ppb
2015-05-19AI77519ND
2015-05-19AI77520ND
2015-05-19AI775211.000 ppb
2015-06-08AI79049ND
2015-08-18AI86918ND
2015-08-18AI86919ND
2015-08-18AI86920ND
2015-08-18AI86921ND
2015-11-17AJ01158ND
2015-11-17AJ01159ND
2015-11-17AJ01160ND
2015-11-17AJ01161ND
2016-02-16AJ064941.20 ppb
2016-02-16AJ06495ND
2016-02-16AJ06496ND
2016-02-16AJ064971.50 ppb
2016-05-17AJ12326ND
2016-05-17AJ12327ND
2016-05-17AJ12328ND
2016-05-17AJ12329ND
2016-08-16AJ22880ND
2016-08-16AJ22881ND
2016-08-16AJ22882ND
2016-08-16AJ22883ND
2016-11-14AJ334181.80 ppb
2016-11-14AJ33419ND
2016-11-14AJ334201.10 ppb
2016-11-14AJ334211.70 ppb
2017-02-21AJ46791ND
2017-02-21AJ46792ND
2017-02-21AJ46793ND
2017-02-21AJ46794ND
2017-02-27AJ47102ND
2017-04-25AJ53923ND
2017-05-17AJ55669ND
2017-05-17AJ55670ND
2017-05-17AJ55671ND
2017-05-17AJ55672ND
2017-07-31AJ62143ND
2017-08-21AJ651151.20 ppb
2017-08-21AJ65116ND
2017-08-21AJ65117ND
2017-08-21AJ651181.40 ppb
2017-10-24AJ72261ND
2017-11-14AJ73753ND
2017-11-14AJ73754ND
2017-11-14AJ73755ND
2017-11-14AJ73756ND
2018-02-21AJ84351ND
2018-02-21AJ84352ND
2018-02-21AJ84353ND
2018-02-21AJ84354ND
2018-03-06AJ85164ND
2018-05-15AJ89577ND
2018-05-15AJ89578ND
2018-05-15AJ89579ND
2018-05-15AJ89580ND
2018-08-21AJ98444ND
2018-08-21AJ98445ND
2018-08-21AJ98446ND
2018-08-21AJ98447ND
2018-11-12AK05767ND
2018-11-12AK05768ND
2018-11-12AK05769ND
2018-11-12AK057701.10 ppb
2019-02-18AK11645ND
2019-02-18AK11646ND
2019-02-18AK11647ND
2019-02-18AK11648ND
2019-05-14AK174280.920 ppb
2019-05-20AK17823ND
2019-05-20AK17824ND
2019-05-20AK17825ND
2019-05-20AK17826ND
2019-08-19AK26739ND
2019-08-19AK26740ND
2019-08-19AK26741ND
2019-08-19AK26742ND
2019-11-18AK36977ND
2019-11-18AK36978ND
2019-11-18AK36979ND
2019-11-18AK36980ND