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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Oil City Water Works

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

 

102

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.400 ppb226ND - 2.10 ppb
20150.214 ppb164ND - 0.940 ppb
20160.121 ppb164ND - 0.560 ppb
20170.476 ppb168ND - 1.30 ppb
2018ND160ND
20190.0963 ppb164ND - 0.410 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
2014-01-13680-97788-6ND
2014-01-13680-97788-7ND
2014-01-13680-97788-6ND
2014-01-13680-97788-7ND
2014-04-01680-100011-17ND
2014-04-01680-100011-18ND
2014-04-01680-100011-17ND
2014-04-01680-100011-18ND
2014-04-07AD90459ND
2014-04-07AD90459ND
2014-07-01680-102989-1ND
2014-07-01680-102989-2ND
2014-07-01680-102989-1ND
2014-07-01680-102989-2ND
2014-10-01680-94757-51.80 ppb
2014-10-01680-94757-62.10 ppb
2014-10-01680-94757-51.80 ppb
2014-10-01680-94757-62.10 ppb
2014-10-07680-106182-130.500 ppb
2014-10-07680-106182-14ND
2014-10-07680-106182-130.500 ppb
2014-10-07680-106182-14ND
2015-01-06680-108888-130.940 ppb
2015-01-06680-108888-140.770 ppb
2015-01-06680-108888-130.940 ppb
2015-01-06680-108888-140.770 ppb
2015-04-07680-111455-1ND
2015-04-07680-111455-2ND
2015-04-07680-111455-1ND
2015-04-07680-111455-2ND
2015-07-07680-114330-3ND
2015-07-07680-114330-4ND
2015-07-07680-114330-3ND
2015-07-07680-114330-4ND
2015-10-08680-117690-10ND
2015-10-08680-117690-11ND
2015-10-08680-117690-10ND
2015-10-08680-117690-11ND
2016-01-05680-120689-1ND
2016-01-05680-120689-2ND
2016-01-05680-120689-1ND
2016-01-05680-120689-2ND
2016-04-05680-123787-10ND
2016-04-05680-123787-11ND
2016-04-05680-123787-10ND
2016-04-05680-123787-11ND
2016-07-05680-127314-3ND
2016-07-05680-127314-4ND
2016-07-05680-127314-3ND
2016-07-05680-127314-4ND
2016-10-04680-130520-170.560 ppb
2016-10-04680-130520-180.410 ppb
2016-10-04680-130520-170.560 ppb
2016-10-04680-130520-180.410 ppb
2017-01-20352902040011.30 ppb
2017-01-20352902040021.10 ppb
2017-01-20352902040011.30 ppb
2017-01-20352902040021.10 ppb
2017-04-06353051840230.480 ppb
2017-04-06353051840240.930 ppb
2017-04-06353051840230.480 ppb
2017-04-06353051840240.930 ppb
2017-07-1335324317017ND
2017-07-1335324317018ND
2017-07-1335324317017ND
2017-07-1335324317018ND
2017-10-2035343432001ND
2017-10-2035343432002ND
2017-10-2035343432001ND
2017-10-2035343432002ND
2018-01-1935369360001ND
2018-01-1935369360002ND
2018-01-1935369360001ND
2018-01-1935369360002ND
2018-04-0535384642001ND
2018-04-0535384642002ND
2018-04-0535384642001ND
2018-04-0535384642002ND
2018-07-1235404359001ND
2018-07-1235404359002ND
2018-07-1235404359001ND
2018-07-1235404359002ND
2018-10-0435422547001ND
2018-10-0435422547002ND
2018-10-0435422547001ND
2018-10-0435422547002ND
2019-01-1035441824001ND
2019-01-1035441824002ND
2019-01-1035441824001ND
2019-01-1035441824002ND
2019-04-0335459674001ND
2019-04-0335459674002ND
2019-04-0335459674001ND
2019-04-0335459674002ND
2019-07-1135481744001ND
2019-07-1135481744002ND
2019-07-1135481744001ND
2019-07-1135481744002ND
2019-10-09355045810010.410 ppb
2019-10-09355045810020.360 ppb
2019-10-09355045810010.410 ppb
2019-10-09355045810020.360 ppb