Cobalt

City of Friendswood

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
2013	ND	30	ND
2014	ND	2	ND
2015	N/A	0	N/A
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
2013-05-01	1305094-017A	ND
2013-05-01	1305094-011A	ND
2013-05-01	1305094-009A	ND
2013-05-01	1305094-003A	ND
2013-05-01	1305094-007A	ND
2013-05-01	1305094-005A	ND
2013-05-01	1305094-023A	ND
2013-05-01	1305094-025A	ND
2013-05-01	1305094-027A	ND
2013-05-01	1305094-021A	ND
2013-05-01	1305094-019A	ND
2013-05-01	1305094-015A	ND
2013-05-01	1305094-013A	ND
2013-05-01	1305094-001A	ND
2013-08-22	Q1306099001	ND
2013-08-28	Q1306099003	ND
2013-11-14	Q1313371024	ND
2013-11-14	Q1313371019	ND
2013-11-14	Q1313371021	ND
2013-11-14	Q1313371017	ND
2013-11-14	Q1313371022	ND
2013-11-14	Q1313371026	ND
2013-11-14	Q1313371007	ND
2013-11-14	Q1313371009	ND
2013-11-14	Q1313371003	ND
2013-11-14	Q1313371005	ND
2013-11-14	Q1313371001	ND
2013-11-14	Q1313371015	ND
2013-11-14	Q1313371013	ND
2013-11-14	Q1313371011	ND
2014-02-18	Q1404903001	ND
2014-02-18	Q1404903003	ND