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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Rome

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

 

102

Samples

0

Samples exceeding legal limit (MCL)

30

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0588 ppb171ND - 1.000 ppb
2015ND170ND
20160.924 ppb179ND - 2.30 ppb
20171.29 ppb1710ND - 3.40 ppb
20180.624 ppb177ND - 2.30 ppb
20190.271 ppb173ND - 1.90 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
2014-02-10AI27767ND
2014-02-10AI27768ND
2014-02-10AI27769ND
2014-02-10AI27770ND
2014-03-19AI36267ND
2014-05-12AI40336ND
2014-05-12AI40337ND
2014-05-12AI40338ND
2014-05-12AI40339ND
2014-08-11AI49070ND
2014-08-11AI49071ND
2014-08-11AI49072ND
2014-08-11AI49073ND
2014-11-11AI592871.000 ppb
2014-11-11AI59288ND
2014-11-11AI59289ND
2014-11-11AI59290ND
2015-02-10AI64645ND
2015-02-10AI64646ND
2015-02-10AI64647ND
2015-02-10AI64648ND
2015-03-02AI65647ND
2015-05-11AI76797ND
2015-05-11AI76798ND
2015-05-11AI76799ND
2015-05-11AI76800ND
2015-08-10AI85766ND
2015-08-10AI85767ND
2015-08-10AI85768ND
2015-08-10AI85769ND
2015-11-11AJ00898ND
2015-11-11AJ00899ND
2015-11-11AJ00900ND
2015-11-11AJ00901ND
2016-02-08AJ06060ND
2016-02-08AJ06061ND
2016-02-08AJ06062ND
2016-02-08AJ06063ND
2016-03-07AJ07602ND
2016-05-10AJ119401.50 ppb
2016-05-10AJ11941ND
2016-05-10AJ11942ND
2016-05-10AJ11943ND
2016-08-09AJ218082.30 ppb
2016-08-09AJ218092.10 ppb
2016-08-09AJ218102.00 ppb
2016-08-09AJ218112.20 ppb
2016-11-10AJ333101.10 ppb
2016-11-10AJ333111.30 ppb
2016-11-10AJ333121.20 ppb
2016-11-10AJ333132.00 ppb
2017-02-08AJ460312.40 ppb
2017-02-08AJ460322.50 ppb
2017-02-08AJ460332.40 ppb
2017-02-08AJ460341.90 ppb
2017-05-09AJ55066ND
2017-05-09AJ550671.000 ppb
2017-05-09AJ55068ND
2017-05-09AJ550691.10 ppb
2017-05-16AJ55537ND
2017-08-07AJ630342.00 ppb
2017-08-07AJ630352.00 ppb
2017-08-07AJ630363.30 ppb
2017-08-07AJ630373.40 ppb
2017-11-13AJ73621ND
2017-11-13AJ73622ND
2017-11-13AJ73623ND
2017-11-13AJ73624ND
2018-02-12AJ83658ND
2018-02-12AJ836591.000 ppb
2018-02-12AJ836602.10 ppb
2018-02-12AJ836612.30 ppb
2018-02-20AJ84210ND
2018-05-08AJ89058ND
2018-05-08AJ89059ND
2018-05-08AJ89060ND
2018-05-08AJ89061ND
2018-08-08AJ97143ND
2018-08-08AJ971441.20 ppb
2018-08-08AJ971451.40 ppb
2018-08-08AJ97146ND
2018-11-13AK05841ND
2018-11-13AK05842ND
2018-11-13AK058431.000 ppb
2018-11-13AK058441.60 ppb
2019-02-14AK11374ND
2019-02-14AK11375ND
2019-02-14AK11376ND
2019-02-14AK11377ND
2019-04-04AK14664ND
2019-05-08AK16859ND
2019-05-08AK16860ND
2019-05-08AK16861ND
2019-05-08AK16862ND
2019-08-08AK25468ND
2019-08-08AK254691.90 ppb
2019-08-08AK254701.50 ppb
2019-08-08AK254711.20 ppb
2019-11-13AK36669ND
2019-11-13AK36670ND
2019-11-13AK36671ND
2019-11-13AK36672ND