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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Harris County Municipal Utility District 158

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

 

4

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results

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
2014-02-17104921QND
2014-02-17304817PND
2014-09-15108957PND
2014-09-15308956PND