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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Arizona Water Company - Sedona

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
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
2014-07-283072129ND
2014-07-283072138ND
2014-07-283072023ND
2014-07-283071999ND
2014-07-283072117ND
2014-07-283072044ND
2014-07-283072048ND
2014-07-283072090ND
2014-07-283072072ND
2014-07-283072052ND
2014-07-283072108ND
2014-08-113080185ND
2014-08-113080202ND
2014-08-113080277ND
2014-08-113080263ND
2014-10-143123355ND
2015-01-143171222ND
2015-01-143171179ND
2015-01-143171279ND
2015-01-143171288ND
2015-01-143171196ND
2015-01-143171248ND
2015-01-203173490ND
2015-01-203173607ND
2015-01-203173522ND
2015-01-203173616ND
2015-01-203173498ND
2015-01-203173570ND
2015-02-173192142ND
2015-02-173192131ND
2015-02-173192135ND
2015-02-173192153ND