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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Oxford Water Works & Sewer Board

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

 

27

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
2015ND270ND
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
2015-03-193212501ND
2015-03-193212539ND
2015-03-193212530ND
2015-03-193212192ND
2015-03-193212204ND
2015-03-193212208ND
2015-03-193212257ND
2015-03-193212225ND
2015-03-193212263ND
2015-03-193212347ND
2015-03-193212483ND
2015-03-193212405ND
2015-06-233269118ND
2015-06-233269050ND
2015-09-243331298ND
2015-09-243331344ND
2015-09-243331481ND
2015-09-243331321ND
2015-09-243331317ND
2015-09-243331325ND
2015-09-243331306ND
2015-09-243331302ND
2015-09-243331472ND
2015-09-243331375ND
2015-09-243331384ND
2015-12-033370049ND
2015-12-033370160ND