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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Salem Water System

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

74

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201487.1 ppb4460.2 ppb - 114.0 ppb
201556.2 ppb1612ND - 113.0 ppb
201681.3 ppb1612ND - 129.0 ppb
201797.8 ppb16160.700 ppb - 144.0 ppb
201866.4 ppb18184.20 ppb - 145.0 ppb
201961.9 ppb1612ND - 102.0 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
2014-11-181351147114.0 ppb
2014-11-18135114660.2 ppb
2014-11-181351147114.0 ppb
2014-11-18135114660.2 ppb
2015-02-171374553ND
2015-02-171374554ND
2015-02-171374554ND
2015-02-171374553ND
2015-05-15139622559.3 ppb
2015-05-15139622684.0 ppb
2015-05-15139622684.0 ppb
2015-05-15139622559.3 ppb
2015-08-17142180124.3 ppb
2015-08-17142180257.9 ppb
2015-08-17142180257.9 ppb
2015-08-17142180124.3 ppb
2015-11-191446028113.0 ppb
2015-11-191446029111.0 ppb
2015-11-191446029111.0 ppb
2015-11-191446028113.0 ppb
2016-02-161468279ND
2016-02-161468280ND
2016-02-161468280ND
2016-02-161468279ND
2016-05-111491040104.0 ppb
2016-05-111491041128.0 ppb
2016-05-111491040104.0 ppb
2016-05-111491041128.0 ppb
2016-08-15151643884.1 ppb
2016-08-15151643980.6 ppb
2016-08-15151643884.1 ppb
2016-08-15151643980.6 ppb
2016-11-081539771125.0 ppb
2016-11-081539772129.0 ppb
2016-11-081539771125.0 ppb
2016-11-081539772129.0 ppb
2017-02-0235292874009108.0 ppb
2017-02-0235292874010129.0 ppb
2017-02-0235292874010129.0 ppb
2017-02-0235292874009108.0 ppb
2017-05-1635312626003109.0 ppb
2017-05-1635312626004144.0 ppb
2017-05-1635312626003109.0 ppb
2017-05-1635312626004144.0 ppb
2017-08-093532980501676.1 ppb
2017-08-093532980501592.7 ppb
2017-08-093532980501676.1 ppb
2017-08-093532980501592.7 ppb
2017-11-15353491850010.700 ppb
2017-11-15353491850010.700 ppb
2017-11-1535349185002123.0 ppb
2017-11-1535349185002123.0 ppb
2018-02-203537578500126.3 ppb
2018-02-203537578500219.4 ppb
2018-02-203537578500126.3 ppb
2018-02-203537578500219.4 ppb
2018-05-2335394582002141.0 ppb
2018-05-2335394582001145.0 ppb
2018-05-2335394582001145.0 ppb
2018-05-2335394582002141.0 ppb
2018-08-20354127730024.20 ppb
2018-08-20354127730024.20 ppb
2018-08-20354127730016.70 ppb
2018-08-20354127730016.70 ppb
2018-09-133541792600121.8 ppb
2018-09-133541792600121.8 ppb
2018-11-1935432393001119.0 ppb
2018-11-1935432393002114.0 ppb
2018-11-1935432393001119.0 ppb
2018-11-1935432393002114.0 ppb
2019-02-183544936400257.6 ppb
2019-02-183544936400158.4 ppb
2019-02-183544936400158.4 ppb
2019-02-183544936400257.6 ppb
2019-05-163546937500282.6 ppb
2019-05-163546937500282.6 ppb
2019-05-163546937500193.9 ppb
2019-05-163546937500193.9 ppb
2019-08-1435491221002102.0 ppb
2019-08-1435491221001101.0 ppb
2019-08-1435491221001101.0 ppb
2019-08-1435491221002102.0 ppb
2019-11-1835514067001ND
2019-11-1835514067002ND
2019-11-1835514067001ND
2019-11-1835514067002ND