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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Marion Waterworks

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

 

68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND270ND
2015ND140ND
2016ND60ND
2017ND70ND
2018ND100ND
2019ND40ND

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
2014-01-1414016003902ND
2014-01-1414016003802ND
2014-01-1414016004102ND
2014-01-1414016004002ND
2014-01-2114023010902ND
2014-01-2114023010802ND
2014-01-2114023011002ND
2014-02-1914051001901ND
2014-04-0714100001602ND
2014-04-0714100001502ND
2014-04-0714100001702ND
2014-04-0714100000501ND
2014-04-0714100001402ND
2014-07-1414198003002ND
2014-07-1414198000601ND
2014-07-1414198000701ND
2014-07-1414198003102ND
2014-07-1414198002902ND
2014-07-1414198000501ND
2014-07-1414198002802ND
2014-10-1314289002202ND
2014-10-1314289002002ND
2014-10-1314289002102ND
2014-10-1314289002302ND
2014-11-1014316000601ND
2014-11-1014316000501ND
2014-11-2414330004001ND
2015-01-2715029007302ND
2015-01-2715029007401ND
2015-06-0915161004302ND
2015-06-0915161004202ND
2015-06-0915161002901ND
2015-06-0915161003001ND
2015-06-2215175000402ND
2015-06-2215175000502ND
2015-09-1615260000309ND
2015-09-1615260000509ND
2015-09-1615260000409ND
2015-11-1915324002002ND
2015-11-1915324001609ND
2015-11-1915324001802ND
2016-02-1516049004901ND
2016-04-2516119012202ND
2016-04-2516119012102ND
2016-07-1216196006901ND
2016-10-0316279002302ND
2016-10-0316279002402ND
2017-01-1617019008201ND
2017-04-1117103009302ND
2017-04-1117103009602ND
2017-08-0117215002201ND
2017-10-3017306004502ND
2017-10-3017306004702ND
2017-12-0617341002009ND
2018-01-1818019004206ND
2018-01-1818019004301ND
2018-04-1018101008309ND
2018-05-0818130001802ND
2018-05-0818130001902ND
2018-08-1518228001409ND
2018-08-1518228001309ND
2018-08-1518228001209ND
2018-10-1518291006802ND
2018-10-1518291006902ND
2019-01-0719010014901ND
2019-07-3019212004401ND
2019-10-0819283006202ND
2019-10-0819283006102ND