Cobalt

Town of Holly Springs

NOTE: Town of Holly Springs purchases water from Harnett County Department of Public Utilities which is required to test for cobalt. Sample information shown below was taken by Harnett County Department of Public Utilities.

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

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	ND	4	ND
2014	ND	4	ND
2015	ND	2	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
2014-06-11	3043287	ND
2014-06-11	3043279	ND
2014-09-17	3106700	ND
2014-09-17	3106696	ND
2014-12-10	3153333	ND
2014-12-10	3153487	ND
2015-03-17	3209395	ND
2015-03-17	3209424	ND