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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

East Bay Municipal Utility District

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

 

38

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
2013ND80ND
2014ND280ND
2015ND20ND
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
2013-10-09B3J1229-04ND
2013-10-09B3J1237-05ND
2013-10-09B3J1237-03ND
2013-10-09B3J1237-01ND
2013-10-09B3J1237-07ND
2013-10-09B3J1229-10ND
2013-10-09B3J1229-07ND
2013-10-09B3J1229-01ND
2014-01-08B4A0937-05ND
2014-01-08B4A0937-08ND
2014-01-08B4A0937-03ND
2014-01-08B4A0937-01ND
2014-02-25B4B2486-04ND
2014-02-25B4B2486-01ND
2014-04-09B4D1270-07ND
2014-04-09B4D1270-01ND
2014-04-09B4D1270-10ND
2014-04-09B4D1270-19ND
2014-04-09B4D1270-15ND
2014-04-09B4D1270-17ND
2014-04-09B4D1270-13ND
2014-04-09B4D1270-04ND
2014-04-29B4E0018-01ND
2014-04-29B4E0018-04ND
2014-07-09B4G1290-01ND
2014-07-09B4G1278-01ND
2014-07-09B4G1269-01ND
2014-07-09B4G1282-01ND
2014-07-09B4G1285-01ND
2014-07-09B4G1291-01ND
2014-07-09B4G1292-01ND
2014-07-09B4G1293-01ND
2014-07-16B4G1982-04ND
2014-07-16B4G1982-01ND
2014-10-09B4J1130-04ND
2014-10-09B4J1130-01ND
2015-01-07B5A0784-01ND
2015-01-07B5A0784-04ND