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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of Ripon

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

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND110ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/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
2013-12-18A3L0672-11AND
2013-12-18A3L0672-07AND
2013-12-18A3L0672-01AND
2013-12-18A3L0672-03AND
2013-12-18A3L0672-29AND
2013-12-18A3L0672-21AND
2013-12-18A3L0672-25AND
2013-12-18A3L0672-27AND
2013-12-18A3L0672-09AND
2013-12-18A3L0672-13AND
2013-12-18A3L0672-05AND