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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Nashville Water Department #1

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

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND160ND
2016N/A00N/A
2017N/A00N/A
2018N/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 Result
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-10-19ND
2015-10-19ND
2015-10-19ND
2015-10-19ND