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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

SBNDO County Service Area 70J

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.

 

61

Samples

0

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND10ND
2014ND50ND
20153.26 ppb2010ND - 22.5 ppb
20163.39 ppb1612ND - 18.4 ppb
20172.81 ppb169ND - 12.1 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
2012-01-063761-005-1035ND
2012-01-133761-003-0950ND
2012-10-263761-002-1035ND
2013-10-183761-005-1020ND
2014-02-033761-005-1345ND
2014-02-033761-003-0930ND
2014-02-033761-002-1030ND
2014-02-033761-001-1130ND
2014-02-043761-004-1300ND
2015-01-063761-002-1350ND
2015-01-063761-003-1425ND
2015-01-063761-005-1210ND
2015-01-123761-604-11051.10 ppb
2015-01-123761-603-11401.80 ppb
2015-01-123761-602-1030ND
2015-01-123761-601-123022.5 ppb
2015-04-083761-601-103020.3 ppb
2015-04-083761-602-13051.30 ppb
2015-04-083761-604-1345ND
2015-04-083761-603-11352.30 ppb
2015-07-093761-602-1335ND
2015-07-093761-604-1300ND
2015-07-093761-601-11305.30 ppb
2015-07-093761-603-12202.20 ppb
2015-07-293761-004-1000ND
2015-10-133761-604-1220ND
2015-10-133761-603-10152.40 ppb
2015-10-133761-601-11006.00 ppb
2015-10-133761-602-1135ND
2016-01-113761-604-1130ND
2016-01-113761-601-095010.3 ppb
2016-01-113761-603-10451.70 ppb
2016-01-113761-602-12151.10 ppb
2016-04-113761-602-11501.40 ppb
2016-04-113761-601-122018.4 ppb
2016-04-133761-604-09501.40 ppb
2016-04-133761-603-09301.70 ppb
2016-07-143761-604-13301.000 ppb
2016-07-143761-601-11305.40 ppb
2016-07-143761-603-13001.10 ppb
2016-07-143761-602-1200ND
2016-10-113761-603-12452.00 ppb
2016-10-113761-601-10508.80 ppb
2016-10-113761-604-1325ND
2016-10-113761-602-1120ND
2017-01-103761-603-12402.30 ppb
2017-01-103761-604-1320ND
2017-01-103761-601-110011.4 ppb
2017-01-103761-602-1130ND
2017-04-113761-601-102012.1 ppb
2017-04-113761-603-12302.00 ppb
2017-04-113761-602-1140ND
2017-04-113761-604-1300ND
2017-07-103761-601-10303.90 ppb
2017-07-103761-602-1115ND
2017-07-103761-603-12301.50 ppb
2017-07-263761-001-1300ND
2017-10-113761-601-14008.20 ppb
2017-10-113761-604-1145ND
2017-10-113761-602-13201.10 ppb
2017-10-113761-603-12152.40 ppb