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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

San Juan Basin Authority

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

 

210

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.105 ppb603ND - 2.70 ppb
20150.165 ppb373ND - 2.60 ppb
20160.0650 ppb201ND - 1.30 ppb
20170.111 ppb272ND - 2.00 ppb
20180.1000 ppb382ND - 1.90 ppb
20190.0893 ppb282ND - 1.50 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
2014-01-079590-001-1045ND
2014-01-079590-002-1000ND
2014-01-079590-003-0938ND
2014-01-079590-004-1030ND
2014-01-079590-014-1130ND
2014-01-079590-015-1155ND
2014-01-229590-005-1030ND
2014-01-229590-006-1145ND
2014-02-049590-001-1040ND
2014-02-049590-003-1218ND
2014-02-049590-004-1239ND
2014-02-049590-005-0959ND
2014-02-049590-014-1314ND
2014-02-049590-015-1339ND
2014-02-119590-002-0945ND
2014-02-119590-006-0839ND
2014-02-119590-010-1058ND
2014-03-049590-001-0940ND
2014-03-049590-002-1015ND
2014-03-049590-003-1039ND
2014-03-049590-004-1105ND
2014-03-049590-005-1120ND
2014-03-049590-006-0830ND
2014-03-049590-014-0905ND
2014-03-049590-015-0750ND
2014-04-089590-001-0954ND
2014-04-089590-002-1018ND
2014-04-089590-003-1039ND
2014-04-089590-004-1105ND
2014-04-089590-005-1115ND
2014-04-089590-006-0913ND
2014-04-089590-014-0842ND
2014-04-089590-015-0758ND
2014-05-069590-001-1008ND
2014-05-069590-002-1046ND
2014-05-069590-003-1116ND
2014-05-069590-004-1020ND
2014-05-069590-005-1130ND
2014-05-069590-006-0930ND
2014-05-069590-010-13401.20 ppb
2014-05-069590-014-0844ND
2014-05-069590-015-0758ND
2014-08-059590-003-1000ND
2014-08-059590-004-1035ND
2014-08-059590-005-1105ND
2014-08-059590-006-0920ND
2014-08-059590-014-0835ND
2014-08-059590-015-0750ND
2014-08-129590-010-10052.70 ppb
2014-09-039590-001-1300ND
2014-09-239590-002-1315ND
2014-11-049590-001-0835ND
2014-11-049590-002-0908ND
2014-11-049590-004-0926ND
2014-11-049590-005-1100ND
2014-11-049590-006-1028ND
2014-11-119590-010-07482.40 ppb
2014-11-259590-003-0909ND
2014-11-259590-014-0838ND
2014-11-259590-015-0750ND
2015-02-039590-002-0940ND
2015-02-039590-003-1025ND
2015-02-039590-004-1044ND
2015-02-039590-005-1120ND
2015-02-039590-006-0900ND
2015-02-109590-010-13001.30 ppb
2015-05-059590-002-0850ND
2015-05-059590-003-0910ND
2015-05-059590-004-0926ND
2015-05-139590-010-1044ND
2015-08-129590-001-1013ND
2015-08-129590-002-0949ND
2015-08-129590-003-0955ND
2015-08-129590-004-1005ND
2015-08-129590-005-1020ND
2015-08-129590-006-1045ND
2015-08-129590-010-09162.20 ppb
2015-08-129590-014-1055ND
2015-08-129590-015-1108ND
2015-08-249590-002-1308ND
2015-08-249590-003-1313ND
2015-08-249590-004-1319ND
2015-08-259590-001-0816ND
2015-08-259590-005-0833ND
2015-08-259590-006-0805ND
2015-08-259590-014-0755ND
2015-08-259590-015-0708ND
2015-10-069590-002-0847ND
2015-10-069590-003-0913ND
2015-10-069590-004-0939ND
2015-11-099590-010-09452.60 ppb
2015-11-309590-002-1118ND
2015-11-309590-003-1130ND
2015-11-309590-004-1141ND
2015-12-229590-001-1135ND
2015-12-229590-014-1149ND
2015-12-229590-015-1300ND
2016-02-019590-010-1121ND
2016-02-089590-001-1000ND
2016-02-089590-002-1027ND
2016-02-089590-003-1040ND
2016-02-089590-004-1052ND
2016-02-089590-005-1110ND
2016-02-089590-006-0840ND
2016-02-089590-014-0852ND
2016-02-089590-015-0909ND
2016-05-099590-010-0947ND
2016-05-179590-001-0928ND
2016-05-179590-002-0822ND
2016-05-179590-003-0845ND
2016-05-179590-004-0911ND
2016-05-179590-005-1010ND
2016-05-179590-015-0745ND
2016-08-019590-002-0836ND
2016-08-019590-003-0906ND
2016-08-019590-004-0945ND
2016-08-089590-010-08241.30 ppb
2017-02-099590-002-0850ND
2017-02-099590-003-0930ND
2017-02-099590-004-1000ND
2017-02-189590-010-1210ND
2017-05-099590-801-0735ND
2017-05-119590-011-1032ND
2017-05-129590-002-0745ND
2017-05-129590-003-0805ND
2017-05-129590-004-0823ND
2017-08-039590-001-1423ND
2017-08-039590-005-1323ND
2017-08-089590-001-0820ND
2017-08-089590-002-0910ND
2017-08-089590-003-1012ND
2017-08-089590-005-1105ND
2017-08-159590-801-11251.000 ppb
2017-09-059590-001-0840ND
2017-09-059590-002-0910ND
2017-09-059590-003-0958ND
2017-09-059590-005-1056ND
2017-09-289590-004-0915ND
2017-11-069590-801-11452.00 ppb
2017-12-049590-001-1315ND
2017-12-049590-002-1358ND
2017-12-049590-003-1435ND
2017-12-049590-004-1505ND
2017-12-049590-005-1150ND
2018-02-219590-001-0845ND
2018-02-219590-005-1006ND
2018-03-059590-001-0959ND
2018-03-059590-002-1032ND
2018-03-059590-003-1115ND
2018-03-059590-004-1140ND
2018-03-059590-005-1214ND
2018-04-132920-001-0913ND
2018-04-139590-001-0913ND
2018-04-132920-002-0955ND
2018-04-139590-002-0955ND
2018-04-139590-003-1045ND
2018-04-132920-004-1120ND
2018-04-139590-004-1120ND
2018-04-132920-005-1215ND
2018-04-139590-005-1215ND
2018-04-229590-801-0844ND
2018-05-099590-001-0900ND
2018-05-099590-002-0945ND
2018-05-099590-003-1025ND
2018-05-099590-004-1055ND
2018-05-099590-005-1140ND
2018-05-219590-010-11101.90 ppb
2018-05-219590-801-11101.90 ppb
2018-08-089590-001-0845ND
2018-08-089590-002-0940ND
2018-08-089590-003-1030ND
2018-08-089590-004-1115ND
2018-08-089590-005-1200ND
2018-08-139590-010-1125ND
2018-08-139590-801-1125ND
2018-11-059590-001-0825ND
2018-11-059590-002-0855ND
2018-11-059590-003-0925ND
2018-11-059590-004-0955ND
2018-11-059590-005-1028ND
2018-11-129590-010-1030ND
2018-11-129590-801-1030ND
2019-03-274792-001-0750ND
2019-03-274792-003-0815ND
2019-03-274792-004-0800ND
2019-03-274792-005-0845ND
2019-03-274792-015-1100ND
2019-04-164792-001-1035ND
2019-04-164792-003-1100ND
2019-04-164792-004-1125ND
2019-04-164792-005-1300ND
2019-04-164792-006-0910ND
2019-04-164792-015-12151.50 ppb
2019-05-145867-801-13001.000 ppb
2019-07-084792-001-0950ND
2019-07-084792-002-1035ND
2019-07-084792-003-1055ND
2019-07-084792-004-1020ND
2019-07-084792-005-1400ND
2019-07-084792-006-1315ND
2019-07-094792-015-0900ND
2019-08-135867-801-1222ND
2019-10-154792-001-0740ND
2019-10-154792-002-1110ND
2019-10-154792-003-1135ND
2019-10-154792-004-1025ND
2019-10-154792-005-1345ND
2019-10-154792-006-0945ND
2019-10-154792-015-0845ND
2019-11-195867-801-1350ND