Bromoform

City of Puyallup

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

188

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	38	0	ND
2015	0.0563 ppb	32	2	ND - 1.10 ppb
2016	0.0500 ppb	32	3	ND - 0.600 ppb
2017	0.0485 ppb	33	2	ND - 1.10 ppb
2018	0.168 ppb	33	8	ND - 0.800 ppb
2019	0.118 ppb	20	4	ND - 0.630 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
2014-02-11	73331	ND
2014-02-11	73324	ND
2014-02-11	73330	ND
2014-02-11	73328	ND
2014-02-11	73327	ND
2014-02-11	73329	ND
2014-02-11	73326	ND
2014-02-11	73325	ND
2014-05-06	73517	ND
2014-05-06	73520	ND
2014-05-06	73519	ND
2014-05-06	73515	ND
2014-05-06	73516	ND
2014-05-06	73514	ND
2014-05-06	73521	ND
2014-05-06	73518	ND
2014-07-08	73732	ND
2014-07-08	73733	ND
2014-07-08	73731	ND
2014-07-09	73752	ND
2014-07-09	73750	ND
2014-07-09	73751	ND
2014-08-08	73950	ND
2014-08-08	73948	ND
2014-08-08	73955	ND
2014-08-08	73953	ND
2014-08-08	73952	ND
2014-08-08	73951	ND
2014-08-08	73954	ND
2014-08-08	73949	ND
2014-11-17	74518	ND
2014-11-17	74517	ND
2014-11-17	74520	ND
2014-11-17	74514	ND
2014-11-17	74515	ND
2014-11-17	74516	ND
2014-11-17	74519	ND
2014-11-17	74521	ND
2015-02-10	74752	ND
2015-02-10	74749	ND
2015-02-10	74750	ND
2015-02-10	74747	ND
2015-02-10	74753	ND
2015-02-10	74751	ND
2015-02-10	74746	ND
2015-02-10	74748	ND
2015-05-07	74983	ND
2015-05-07	74981	ND
2015-05-07	74977	ND
2015-05-07	74980	ND
2015-05-07	74982	ND
2015-05-07	74978	ND
2015-05-07	74979	ND
2015-05-07	74976	ND
2015-08-05	75262	ND
2015-08-05	75261	ND
2015-08-05	75257	ND
2015-08-05	75263	ND
2015-08-05	75259	ND
2015-08-05	75260	ND
2015-08-05	75258	ND
2015-08-05	75256	ND
2015-11-10	75671	ND
2015-11-10	75670	ND
2015-11-10	75675	1.10 ppb
2015-11-10	75674	ND
2015-11-10	75668	ND
2015-11-10	75673	ND
2015-11-10	75672	0.700 ppb
2015-11-10	75669	ND
2016-02-02		ND
2016-02-02		ND
2016-02-02		0.500 ppb
2016-02-02		ND
2016-02-02		ND
2016-02-02		ND
2016-02-02		ND
2016-02-02		ND
2016-05-04		0.600 ppb
2016-05-04		ND
2016-05-04		ND
2016-05-04		ND
2016-05-04		ND
2016-05-04		ND
2016-05-04		ND
2016-05-04		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-08-09		ND
2016-11-14		0.500 ppb
2016-11-14		ND
2016-11-14		ND
2016-11-14		ND
2016-11-14		ND
2016-11-14		ND
2016-11-14		ND
2016-11-14		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-02-06		ND
2017-05-25		ND
2017-05-25		ND
2017-05-25		ND
2017-05-25		ND
2017-05-25		ND
2017-05-25		ND
2017-05-25		1.10 ppb
2017-05-25		ND
2017-08-01		ND
2017-08-01		ND
2017-08-01		ND
2017-08-01		0.500 ppb
2017-08-01		ND
2017-08-01		ND
2017-08-01		ND
2017-08-01		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-11-13		ND
2017-12-28		ND
2018-02-06		ND
2018-02-06		ND
2018-02-06		ND
2018-02-06		0.800 ppb
2018-02-06		0.800 ppb
2018-02-06		0.700 ppb
2018-02-06		ND
2018-02-06		ND
2018-05-03		ND
2018-05-03		ND
2018-05-03		ND
2018-05-03		0.700 ppb
2018-05-03		ND
2018-05-03		ND
2018-05-03		ND
2018-05-03		ND
2018-07-31		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-08-07		ND
2018-11-27		ND
2018-11-27		ND
2018-11-27		ND
2018-11-27		0.610 ppb
2018-11-27		0.690 ppb
2018-11-27		ND
2018-11-27		0.510 ppb
2018-11-27		0.750 ppb
2019-02-05		ND
2019-02-05		ND
2019-02-05		ND
2019-02-05		ND
2019-02-05		0.530 ppb
2019-02-05		ND
2019-02-05		ND
2019-02-05		ND
2019-05-09		0.630 ppb
2019-05-09		ND
2019-05-09		ND
2019-05-09		0.580 ppb
2019-05-09		0.610 ppb
2019-05-09		ND
2019-05-09		ND
2019-05-09		ND
2019-08-01		ND
2019-08-01		ND
2019-11-06		ND
2019-11-06		ND