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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Hope Water Light Comm.

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

 

124

Samples

0

Samples exceeding legal limit (MCL)

89

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201415.8 ppb2220ND - 40.3 ppb
201513.2 ppb1915ND - 30.6 ppb
20168.64 ppb2315ND - 44.6 ppb
20178.29 ppb1811ND - 26.9 ppb
20189.16 ppb1914ND - 25.7 ppb
20197.63 ppb2314ND - 28.3 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
2014-01-071401000370221.5 ppb
2014-01-071401000390219.0 ppb
2014-01-071401000380222.0 ppb
2014-01-071401000410212.5 ppb
2014-04-01140940010022.60 ppb
2014-04-011409400130216.1 ppb
2014-04-011409400120223.3 ppb
2014-04-011409400090221.4 ppb
2014-05-211414200890212.4 ppb
2014-05-21141420087024.40 ppb
2014-05-21141420086029.20 ppb
2014-05-2114142008502ND
2014-07-021418401360236.5 ppb
2014-07-02141840135022.40 ppb
2014-07-021418401370214.2 ppb
2014-07-021418401390213.1 ppb
2014-08-19142330090014.13 ppb
2014-10-011427600050240.3 ppb
2014-10-011427600080219.2 ppb
2014-10-011427600060237.7 ppb
2014-10-011427600090215.7 ppb
2014-10-2914303002701ND
2015-01-051500800190227.3 ppb
2015-01-051500800200229.8 ppb
2015-01-051500800220210.6 ppb
2015-01-051500800230221.3 ppb
2015-04-061510000100224.6 ppb
2015-04-061510000120219.0 ppb
2015-04-061510000130214.6 ppb
2015-04-061510000090213.6 ppb
2015-07-081519000350215.5 ppb
2015-07-08151900033022.80 ppb
2015-07-0815190002101ND
2015-07-081519000360230.6 ppb
2015-07-08151900032022.90 ppb
2015-10-0515282000302ND
2015-10-0515282000402ND
2015-10-05152820005028.20 ppb
2015-10-051528200060229.1 ppb
2015-10-0815282005601ND
2015-10-20152960004010.600 ppb
2016-01-061600801030214.8 ppb
2016-01-06160080102026.40 ppb
2016-01-06160080101026.80 ppb
2016-01-061600801000244.6 ppb
2016-04-041609801160212.5 ppb
2016-04-04160980115027.20 ppb
2016-04-04160980114025.10 ppb
2016-04-041609801130226.1 ppb
2016-07-051618901040210.4 ppb
2016-07-0516189010502ND
2016-07-051618901060210.5 ppb
2016-07-051618901070219.4 ppb
2016-07-05161890108010.520 ppb
2016-07-0516189010901ND
2016-07-0516189011001ND
2016-07-0516189011101ND
2016-07-0516189011201ND
2016-07-0516189011301ND
2016-10-05162800093025.20 ppb
2016-10-051628000940213.6 ppb
2016-10-051628000950215.6 ppb
2016-10-0516280009202ND
2016-10-0516280008901ND
2017-01-041700500480216.9 ppb
2017-01-041700500470210.1 ppb
2017-01-0417005004602ND
2017-01-041700500450226.9 ppb
2017-04-0517096009202ND
2017-04-0517096009302ND
2017-04-051709600940216.5 ppb
2017-04-051709600950212.9 ppb
2017-07-051718700360214.2 ppb
2017-07-051718700350217.4 ppb
2017-07-05171870037028.80 ppb
2017-07-0517187003802ND
2017-07-1817200003901ND
2017-10-0317278002101ND
2017-10-0417278003902ND
2017-10-041727800360211.5 ppb
2017-10-04172780038023.40 ppb
2017-10-041727800370210.6 ppb
2018-01-031800400640211.9 ppb
2018-01-0318004006702ND
2018-01-031800400650211.0 ppb
2018-01-03180040066022.60 ppb
2018-04-041809500920223.8 ppb
2018-04-041809500900225.7 ppb
2018-04-041809500910210.1 ppb
2018-04-0418095008902ND
2018-07-031818600570223.5 ppb
2018-07-03181860059021.30 ppb
2018-07-0318186006002ND
2018-07-031818600580217.5 ppb
2018-07-2418207000701ND
2018-10-03182770064026.90 ppb
2018-10-031827700660220.7 ppb
2018-10-03182770062011.28 ppb
2018-10-03182770063021.10 ppb
2018-10-031827700650216.7 ppb
2018-12-0418340005501ND
2019-01-091901000900212.6 ppb
2019-01-09190100092024.70 ppb
2019-01-0919010009302ND
2019-01-09190100091029.80 ppb
2019-04-021909400420217.5 ppb
2019-04-0219094004002ND
2019-04-02190940041024.90 ppb
2019-04-021909400430228.3 ppb
2019-07-0919191003502ND
2019-07-091919100380227.9 ppb
2019-07-091919100370221.6 ppb
2019-07-09191910036026.50 ppb
2019-08-0519220002801ND
2019-08-05192200029011.48 ppb
2019-08-05192200023011.21 ppb
2019-08-0519220002601ND
2019-08-0519220002701ND
2019-08-0519220002501ND
2019-10-0219276003602ND
2019-10-02192760037026.50 ppb
2019-10-021927600380215.7 ppb
2019-10-021927600390216.8 ppb
2019-10-2919304000701ND