Cobalt

City of Davis

Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	31	ND
2015	ND	1	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	N/A	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 70 ppb

The EWG Health Guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-06	A3L2010-33A	ND
2014-01-06	A3L2010-09A	ND
2014-01-06	A3L2010-49A	ND
2014-01-06	A3L2010-51A	ND
2014-01-06	A3L2010-29A	ND
2014-01-06	A3L2010-45A	ND
2014-01-06	A3L2010-47A	ND
2014-01-06	A3L2010-01A	ND
2014-01-06	A3L2010-21A	ND
2014-01-06	A3L2010-37A	ND
2014-01-06	A3L2010-05A	ND
2014-01-06	A3L2010-41A	ND
2014-01-06	A3L2010-25A	ND
2014-01-06	A3L2010-17A	ND
2014-01-07	A3L2010-13A	ND
2014-08-13	A4F2265-01A	ND
2014-08-13	A4F2265-06A	ND
2014-08-13	A4F2265-11A	ND
2014-08-13	A4F2265-26A	ND
2014-08-13	A4F2265-21A	ND
2014-08-13	A4F2265-16A	ND
2014-08-13	A4F2265-36A	ND
2014-08-13	A4F2265-41A	ND
2014-08-13	A4F2265-58A	ND
2014-08-13	A4F2265-31A	ND
2014-08-13	A4F2265-46A	ND
2014-08-13	A4F2265-51A	ND
2014-08-13	A4F2265-60A	ND
2014-08-13	A4F2265-56A	ND
2014-08-13	A4F2265-62A	ND
2014-08-13	A4F2264-01A	ND
2015-01-13	A4L0813-01A	ND