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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Dale City

NOTE: Dale City purchases water from Fairfax County Water Authority which is required to test for cobalt. Sample information shown below was taken by Fairfax County Water Authority.

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

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
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

NOTE: Dale City purchases water from Fairfax County Water Authority which is required to test for cobalt. Sample information shown below was taken by Fairfax County Water Authority.

Date Lab ID Result
2013-07-17201307180828AMND
2013-07-17201307180824AMND
2013-07-17201307180811AMND
2013-07-17201307180799AMND
2013-07-17201307180801AMND
2013-07-17201307180822AMND
2013-07-17201307180820AMND
2013-10-15201310160240AMND
2013-10-15201310160210AMND
2013-10-15201310160246AMND
2013-10-15201310160200AMND
2013-10-15201310160208AMND
2013-10-15201310160176AMND
2013-10-15201310160171AMND
2014-01-13201401150380AMND
2014-01-13201401140199AMND
2014-01-13201401140197AMND
2014-01-13201401150357AMND
2014-01-13201401150621AMND
2014-01-13201401150723AMND
2014-01-14201401150684AMND
2014-04-14201404150219AMND
2014-04-14201404150254AMND
2014-04-14201404150281AMND
2014-04-14201404150283AMND
2014-04-14201404150439AMND
2014-04-14201404150441AMND
2014-04-14201404150405AMND