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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Tri-County Water Distbr District

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND210ND
2015ND170ND
2016ND170ND
2017ND170ND
2018ND170ND
2019ND120ND

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
2014-01-0714009002801ND
2014-01-2214023004502ND
2014-01-2214023004002ND
2014-01-2214023004102ND
2014-01-2214023004302ND
2014-02-2514058002009ND
2014-04-1614107008309ND
2014-04-1614107008702ND
2014-04-1614107008502ND
2014-04-1614107008402ND
2014-04-1614107008902ND
2014-07-1614198014902ND
2014-07-1614198014702ND
2014-07-1614198014802ND
2014-07-1614198015002ND
2014-07-1614198015109ND
2014-11-1114316005202ND
2014-11-1114316004502ND
2014-11-1114316005502ND
2014-11-1114316004401ND
2014-11-1114316004602ND
2015-02-1015043004702ND
2015-02-1015043004302ND
2015-02-1015043004502ND
2015-02-1015043004802ND
2015-05-1115134004402ND
2015-05-1115134003102ND
2015-05-1115134004702ND
2015-05-1115134004502ND
2015-08-1015225003202ND
2015-08-1015225002902ND
2015-08-1015225002702ND
2015-08-1015225003102ND
2015-10-2015295004101ND
2015-11-1115316000702ND
2015-11-1115316000302ND
2015-11-1115316000602ND
2015-11-1215317003702ND
2016-02-0916042009002ND
2016-02-0916042008502ND
2016-02-0916042008402ND
2016-02-0916042008102ND
2016-05-1016133007402ND
2016-05-1016133007602ND
2016-05-1016133007502ND
2016-05-1016133005002ND
2016-08-0916223008902ND
2016-08-0916223008802ND
2016-08-0916223009002ND
2016-08-0916223008702ND
2016-11-0116308007009ND
2016-11-0716314006302ND
2016-11-0716314006202ND
2016-11-0716314006502ND
2016-11-0716314006402ND
2017-01-3117033005802ND
2017-01-3117033005902ND
2017-01-3117033005702ND
2017-01-3117033005602ND
2017-05-2317145002802ND
2017-05-2317145002502ND
2017-05-2317145003102ND
2017-05-2317145003202ND
2017-08-0817222010602ND
2017-08-0817222010202ND
2017-08-0817222010302ND
2017-08-0817222010802ND
2017-11-0717313009901ND
2017-11-0717313010402ND
2017-11-0717313010302ND
2017-11-0717313010202ND
2017-11-0717313010102ND
2018-02-0618039008002ND
2018-02-0618039007902ND
2018-02-0618039008302ND
2018-02-0618039007802ND
2018-05-0718129003602ND
2018-05-0718129003502ND
2018-05-0718129003402ND
2018-05-0718129003702ND
2018-07-3118213002002ND
2018-07-3118213001802ND
2018-07-3118213002102ND
2018-07-3118213001402ND
2018-10-2218298001801ND
2018-10-3018305003302ND
2018-10-3018305003002ND
2018-10-3018305003102ND
2018-10-3018305003202ND
2019-01-2919031010102ND
2019-01-2919031010402ND
2019-01-2919031010202ND
2019-01-2919031010302ND
2019-04-2419115012002ND
2019-04-2419115011502ND
2019-04-2419115011902ND
2019-04-2419115011802ND
2019-07-2419206008302ND
2019-07-2419206008601ND
2019-07-2419206008402ND
2019-07-2419206008501ND