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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Averydale Mutual Water Company

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND70ND
2014ND50ND
20150.233 ppb61ND - 1.40 ppb
2016ND60ND
20170.183 ppb61ND - 1.10 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
2012-07-103761-003-0925ND
2012-07-103761-004-0936ND
2013-05-143761-001-1300ND
2013-05-143761-004-1232ND
2013-05-143761-006-1314ND
2013-08-133761-004-1013ND
2013-08-133761-001-1121ND
2013-08-133761-003-1022ND
2013-08-133761-006-1127ND
2014-08-053761-800-1407ND
2014-08-053761-801-1350ND
2014-08-193761-006-1320ND
2014-08-193761-003-1346ND
2014-09-093761-001-0918ND
2015-02-173761-004-1414ND
2015-10-133761-006-1532ND
2015-10-133761-800-1505ND
2015-10-133761-801-14551.40 ppb
2015-10-133761-003-1442ND
2015-10-133761-001-1515ND
2016-02-163761-004-1412ND
2016-08-163761-001-1425ND
2016-08-163761-006-1421ND
2016-08-163761-003-1345ND
2016-08-233761-801-1353ND
2016-08-233761-800-1417ND
2017-02-213761-004-1343ND
2017-08-223761-801-14071.10 ppb
2017-08-223761-800-1417ND
2017-08-223761-006-1437ND
2017-08-223761-003-1347ND
2017-08-223761-001-1429ND