Bromoform

Yelm City Of

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	12	ND
2015	ND	18	ND
2016	ND	2	ND
2017	ND	2	ND
2018	ND	2	ND
2019	ND	3	ND

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
2014-06-05	73646	ND
2014-06-05	73647	ND
2014-06-05	73645	ND
2014-06-05	73648	ND
2014-07-17	73811	ND
2014-07-17	73809	ND
2014-07-17	73808	ND
2014-07-17	73810	ND
2014-10-16	74397	ND
2014-10-16	74396	ND
2014-10-16	74398	ND
2014-10-16	74399	ND
2015-02-06	74736	ND
2015-02-06	74734	ND
2015-02-06	74735	ND
2015-02-06	74737	ND
2015-04-02	74860	ND
2015-04-02	74861	ND
2015-04-02	74856	ND
2015-04-02	74857	ND
2015-04-02	74859	ND
2015-04-02	74858	ND
2015-07-13	75149	ND
2015-07-13	75148	ND
2015-07-13	75146	ND
2015-07-13	75147	ND
2015-10-09	75561	ND
2015-10-09	75559	ND
2015-10-09	75560	ND
2015-10-09	75555	ND
2016-08-11		ND
2016-08-11		ND
2017-08-08		ND
2017-08-08		ND
2018-10-04		ND
2018-10-04		ND
2019-05-09		ND
2019-10-22		ND
2019-10-22		ND