Bromoform

Highland County Water Company, Inc.

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	Detections	Range of results
2013	N/A	0	0	N/A
2014	0.473 ppb	10	6	ND - 0.880 ppb
2015	0.500 ppb	2	2	0.500 ppb
2016	0.265 ppb	2	1	ND - 0.530 ppb
2017	0.700 ppb	2	2	0.600 ppb - 0.800 ppb
2018	0.250 ppb	2	1	ND - 0.500 ppb
2019	0.950 ppb	2	2	0.900 ppb - 1.000 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
2014-03-10	A140183202	ND
2014-03-10	A140183201	0.810 ppb
2014-03-10	A140183200	0.750 ppb
2014-03-10	A140183199	0.680 ppb
2014-06-09	A140191436	ND
2014-06-09	A140191438	0.740 ppb
2014-06-09	A140191437	ND
2014-06-09	A140191435	ND
2014-08-11	A140216499	0.880 ppb
2014-08-11	A140216498	0.870 ppb
2015-08-03	A150095772	0.500 ppb
2015-08-03	A150095773	0.500 ppb
2016-08-08	A160427150	ND
2016-08-08	A160427151	0.530 ppb
2017-09-11	A170512483	0.800 ppb
2017-09-11	A170512484	0.600 ppb
2018-08-13	A180626520	ND
2018-08-14	A180626521	0.500 ppb
2019-08-05	19-26808-01	0.900 ppb
2019-08-05	19-26808-02	1.000 ppb