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EWG's Tap Water Database

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Bromoform

Columbus

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.

 

170

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND170ND
20110.237 ppb174ND - 1.20 ppb
20120.409 ppb308ND - 1.80 ppb
20130.0477 ppb352ND - 0.930 ppb
2014ND370ND
20150.841 ppb3414ND - 4.90 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.5 ppb

The 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.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-02-01AG81244ND
2010-02-01AG81245ND
2010-02-01AG81246ND
2010-02-01AG81247ND
2010-03-22AG85185ND
2010-05-04AG88296ND
2010-05-04AG88297ND
2010-05-04AG88298ND
2010-05-04AG88299ND
2010-08-02AG95272ND
2010-08-02AG95273ND
2010-08-02AG95274ND
2010-08-02AG95275ND
2010-11-02AH09769ND
2010-11-02AH09770ND
2010-11-02AH09771ND
2010-11-02AH09772ND
2011-02-07AH18837ND
2011-02-07AH18838ND
2011-02-07AH18839ND
2011-02-07AH18840ND
2011-04-18AH27565ND
2011-04-18AH27566ND
2011-04-18AH27567ND
2011-04-18AH27568ND
2011-08-08AH366561.10 ppb
2011-08-08AH366571.10 ppb
2011-08-08AH366581.20 ppb
2011-08-08AH36659ND
2011-09-06AH397540.630 ppb
2011-12-15AH48533ND
2011-12-15AH48534ND
2011-12-15AH48535ND
2011-12-15AH48536ND
2012-02-06AH52620ND
2012-02-06AH52621ND
2012-02-06AH52622ND
2012-02-06AH52623ND
2012-04-09AH56315ND
2012-04-09AH56316ND
2012-04-09AH56317ND
2012-04-09AH56318ND
2012-04-09AH56319ND
2012-04-09AH56320ND
2012-04-09AH56321ND
2012-04-09AH56322ND
2012-05-01AH57752ND
2012-07-10AH69586ND
2012-07-10AH69587ND
2012-07-10AH69588ND
2012-07-10AH69589ND
2012-07-10AH69590ND
2012-07-10AH69591ND
2012-07-10AH69592ND
2012-07-10AH69593ND
2012-10-10AH81541ND
2012-10-10AH815421.70 ppb
2012-10-10AH815431.60 ppb
2012-10-10AH815441.70 ppb
2012-10-10AH815451.80 ppb
2012-10-10AH815461.80 ppb
2012-10-10AH815471.60 ppb
2012-10-10AH815481.20 ppb
2012-11-05AH832570.860 ppb
2013-01-08AH87125ND
2013-01-08AH87126ND
2013-01-08AH87127ND
2013-01-08AH87128ND
2013-01-08AH87129ND
2013-01-08AH87130ND
2013-01-08AH87131ND
2013-01-08AH87132ND
2013-02-05AH884510.930 ppb
2013-02-05AH884520.740 ppb
2013-04-08AH98641ND
2013-04-08AH98642ND
2013-04-08AH98643ND
2013-04-08AH98644ND
2013-04-08AH98645ND
2013-04-08AH98646ND
2013-04-08AH98647ND
2013-04-08AH98648ND
2013-07-09AI05826ND
2013-07-09AI05827ND
2013-07-09AI05828ND
2013-07-09AI05829ND
2013-07-09AI05830ND
2013-07-09AI05831ND
2013-07-09AI05832ND
2013-07-09AI05833ND
2013-10-02AI19612ND
2013-10-08AI20212ND
2013-10-08AI20213ND
2013-10-08AI20214ND
2013-10-08AI20215ND
2013-10-08AI20216ND
2013-10-08AI20217ND
2013-10-08AI20218ND
2013-10-08AI20219ND
2014-01-10AI26333ND
2014-01-10AI26334ND
2014-01-10AI26335ND
2014-01-10AI26336ND
2014-01-10AI26337ND
2014-01-10AI26338ND
2014-01-10AI26339ND
2014-01-10AI26340ND
2014-01-20AI26898ND
2014-01-20AI26899ND
2014-04-08AI37669ND
2014-04-08AI37670ND
2014-04-08AI37671ND
2014-04-08AI37672ND
2014-04-08AI37673ND
2014-04-08AI37674ND
2014-04-08AI37675ND
2014-04-08AI37676ND
2014-05-05AI39470ND
2014-07-08AI45284ND
2014-07-08AI45285ND
2014-07-08AI45286ND
2014-07-08AI45287ND
2014-07-08AI45288ND
2014-07-08AI45289ND
2014-07-08AI45290ND
2014-07-09AI45291ND
2014-07-30AI47500ND
2014-10-07AI57045ND
2014-10-07AI57046ND
2014-10-07AI57047ND
2014-10-07AI57048ND
2014-10-07AI57049ND
2014-10-07AI57050ND
2014-10-07AI57051ND
2014-10-07AI57052ND
2014-11-03AI58784ND
2015-01-13AI62774ND
2015-01-13AI62775ND
2015-01-13AI62776ND
2015-01-13AI62777ND
2015-01-13AI62778ND
2015-01-13AI62779ND
2015-01-13AI62780ND
2015-01-13AI62781ND
2015-03-24AI69581ND
2015-03-24AI69582ND
2015-04-07AI74259ND
2015-04-07AI74260ND
2015-04-07AI74261ND
2015-04-07AI74262ND
2015-04-07AI74263ND
2015-04-07AI74264ND
2015-04-07AI74265ND
2015-04-07AI74266ND
2015-07-07AI819241.40 ppb
2015-07-07AI819251.60 ppb
2015-07-07AI819264.00 ppb
2015-07-07AI819274.90 ppb
2015-07-07AI819282.70 ppb
2015-07-07AI819292.30 ppb
2015-07-07AI819301.60 ppb
2015-07-07AI819311.10 ppb
2015-10-06AI923871.10 ppb
2015-10-06AI92388ND
2015-10-06AI923891.50 ppb
2015-10-06AI923901.60 ppb
2015-10-06AI923911.40 ppb
2015-10-06AI923921.70 ppb
2015-10-06AI923931.70 ppb
2015-10-06AI92394ND