Cobalt

Metropolitan DWID

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	44	ND
2015	ND	44	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
2014-08-06	201408070497AM	ND
2014-08-06	201408070495AM	ND
2014-08-11	201408120141AM	ND
2014-08-11	201408120143AM	ND
2014-08-11	201408120145AM	ND
2014-08-11	201408120137AM	ND
2014-08-11	201408120149AM	ND
2014-08-11	201408120139AM	ND
2014-08-11	201408120147AM	ND
2014-08-11	201408120151AM	ND
2014-08-12	201408130506AM	ND
2014-08-12	201408130510AM	ND
2014-08-12	201408130512AM	ND
2014-08-12	201408130502AM	ND
2014-08-12	201408130500AM	ND
2014-08-12	201408130508AM	ND
2014-08-12	201408130498AM	ND
2014-08-12	201408130504AM	ND
2014-08-14	201408150334AM	ND
2014-08-14	201408150340AM	ND
2014-08-14	201408150342AM	ND
2014-08-14	201408150336AM	ND
2014-08-14	201408150338AM	ND
2014-08-18	201408190498AM	ND
2014-08-18	201408190500AM	ND
2014-08-18	201408190496AM	ND
2014-08-18	201408190663AM	ND
2014-08-18	201408190665AM	ND
2014-08-18	201408190667AM	ND
2014-08-19	201408200417AM	ND
2014-08-19	201408200435AM	ND
2014-08-19	201408200433AM	ND
2014-08-19	201408200439AM	ND
2014-08-19	201408200437AM	ND
2014-08-19	201408200419AM	ND
2014-08-19	201408200415AM	ND
2014-08-20	201408210492AM	ND
2014-08-20	201408210482AM	ND
2014-08-20	201408210488AM	ND
2014-08-20	201408210484AM	ND
2014-08-20	201408210490AM	ND
2014-08-20	201408210480AM	ND
2014-08-25	201408260297AM	ND
2014-09-22	201409230534AM	ND
2015-02-17	201502180770AM	ND
2015-02-17	201502180795AM	ND
2015-02-17	201502180797AM	ND
2015-02-17	201502180766AM	ND
2015-02-17	201502180791AM	ND
2015-02-17	201502180768AM	ND
2015-02-17	201502180793AM	ND
2015-02-18	201502190975AM	ND
2015-02-18	201502190761AM	ND
2015-02-18	201502190763AM	ND
2015-02-18	201502190977AM	ND
2015-02-18	201502190757AM	ND
2015-02-18	201502190759AM	ND
2015-02-19	201502200209AM	ND
2015-02-19	201502200384AM	ND
2015-02-19	201502200382AM	ND
2015-02-19	201502200386AM	ND
2015-02-19	201502200211AM	ND
2015-02-19	201502200213AM	ND
2015-02-19	201502200207AM	ND
2015-02-23	201502240512AM	ND
2015-02-23	201502240514AM	ND
2015-02-23	201502240516AM	ND
2015-02-23	201502240510AM	ND
2015-02-23	201502240508AM	ND
2015-02-23	201502240504AM	ND
2015-02-23	201502240506AM	ND
2015-02-23	201502240502AM	ND
2015-02-24	201502250889AM	ND
2015-02-24	201502250887AM	ND
2015-02-24	201502250592AM	ND
2015-02-24	201502250590AM	ND
2015-02-24	201502250588AM	ND
2015-02-24	201502250594AM	ND
2015-02-24	201502250600AM	ND
2015-02-24	201502250602AM	ND
2015-02-24	201502250598AM	ND
2015-02-24	201502250596AM	ND
2015-02-25	201502260403AM	ND
2015-02-25	201502260401AM	ND
2015-02-25	201502260399AM	ND
2015-02-25	201502260397AM	ND
2015-02-25	201502260405AM	ND
2015-08-31	201509010996AM	ND