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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

City of Granbury

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

MORE ABOUT THIS CONTAMINANT

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND160ND
2014ND280ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/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
2013-12-182948733ND
2013-12-182948828ND
2013-12-182948905ND
2013-12-182948915ND
2013-12-182948869ND
2013-12-182948726ND
2013-12-182948807ND
2013-12-182948768ND
2013-12-182948746ND
2013-12-182948878ND
2013-12-182948742ND
2013-12-182948858ND
2013-12-182948887ND
2013-12-182948897ND
2013-12-192950137ND
2013-12-192949463ND
2014-01-152958381ND
2014-01-152958379ND
2014-02-192977429ND
2014-03-112990040ND
2014-03-192994538ND
2014-04-013001734ND
2014-06-173047541ND
2014-06-173047587ND
2014-06-173047285ND
2014-06-173047358ND
2014-06-173047596ND
2014-06-173047348ND
2014-06-173047435ND
2014-06-173047645ND
2014-06-173047563ND
2014-06-173047263ND
2014-06-173047571ND
2014-06-173047429ND
2014-06-263053841ND
2014-06-263053977ND
2014-06-263053890ND
2014-06-263053993ND
2014-06-263053957ND
2014-06-263053861ND
2014-06-263053828ND
2014-07-143062650ND
2014-09-173106658ND
2014-09-173106662ND