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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

California Water Service (CWS) - Bakersfield

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

 

119

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND350ND
2015ND810ND
2016ND30ND
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
2014-06-09A4E0742-01AND
2014-06-09A4E0742-09AND
2014-06-10A4E0742-13AND
2014-06-16A4E2256-01AND
2014-06-16A4E2253-01AND
2014-06-16A4E2250-01AND
2014-06-16A4E2260-01AND
2014-06-16A4E2261-01AND
2014-07-14A4F2472-01AND
2014-07-15A4F2476-01AND
2014-07-15A4F2477-01AND
2014-07-15A4F1967-01AND
2014-07-15A4F1974-01AND
2014-07-18A4G0683-01AND
2014-07-18A4G0684-01AND
2014-08-11A4G2144-01AND
2014-08-18A4H0210-01AND
2014-08-18A4H0211-01AND
2014-08-18A4G2151-01AND
2014-08-18A4G2785-01AND
2014-09-10A4H2706-01AND
2014-09-10A4H2669-01AND
2014-09-15A4I0210-01AND
2014-09-23A4H2659-01AND
2014-09-23A4I1702-01AND
2014-09-23A4I0209-01AND
2014-10-07A4H2671-01AND
2014-10-13A4J0081-01AND
2014-10-17A4J1137-01AND
2014-10-17A4I2273-01AND
2014-10-21A4J1136-01AND
2014-12-08A4K2091-01AND
2014-12-08A4K2089-01AND
2014-12-08A4K2096-01AND
2014-12-10A4K2148-01AND
2015-01-05A4L2527-01AND
2015-01-07A4L2529-01AND
2015-01-09A4L2605-01AND
2015-01-09A4L2606-01AND
2015-01-09A4L2604-01AND
2015-01-16A5A0581-01AND
2015-01-16A5A0582-01AND
2015-01-16A4L2607-01AND
2015-01-16A5A0584-01AND
2015-01-16A5A0580-01AND
2015-01-23A4K2092-01AND
2015-01-30A5A1899-01AND
2015-02-02A5A1993-01AND
2015-02-02A5A1898-01AND
2015-02-06A5A1961-01AND
2015-02-10A5A1960-01AND
2015-02-12A5B0643-01AND
2015-03-12A5C1199-01AND
2015-03-16201503180506AMND
2015-03-25201503270211AMND
2015-03-25201503280109AMND
2015-03-25201503280111AMND
2015-03-25201503270225AMND
2015-04-07201504090285AMND
2015-04-07201504090624AMND
2015-04-30201505050064AMND
2015-04-30201505050055AMND
2015-05-05201505070529AMND
2015-05-05201505210072AMND
2015-05-08A4L0727-01AND
2015-05-08A4L0728-01AND
2015-05-08A4L0721-01AND
2015-05-11201505130589AMND
2015-05-11201505130577AMND
2015-05-11201505130464AMND
2015-05-15201505210106AMND
2015-05-15201505210082AMND
2015-05-15201505200401AMND
2015-05-19201505210768AMND
2015-05-19A5E0959-01AND
2015-06-09201506120269AMND
2015-06-09201506120181AMND
2015-06-09201506130054AMND
2015-06-09201506120196AMND
2015-06-15201506200025AMND
2015-06-15201506190215AMND
2015-06-16201506190217AMND
2015-06-23201506250423AMND
2015-06-24201506260311AMND
2015-06-24201506260317AMND
2015-06-24201506290227AMND
2015-06-24201506260263AMND
2015-07-27201507290528AMND
2015-07-27201507290712AMND
2015-07-27201507290522AMND
2015-08-25201509010435AMND
2015-08-25201509010446AMND
2015-08-25201509010467AMND
2015-08-25201509010615AMND
2015-08-25201508280060AMND
2015-08-25201509010643AMND
2015-08-25201509011180AMND
2015-08-25201508280062AMND
2015-08-25201508280207AMND
2015-08-25201509011043AMND
2015-08-25201508280100AMND
2015-09-03201509090385AMND
2015-09-11201509150618AMND
2015-09-29201510020554AMND
2015-09-30201510020499AMND
2015-09-30201510020597AMND
2015-10-05201510090395AMND
2015-10-05201510090187AMND
2015-10-06201510090459AMND
2015-10-09201510150108AMND
2015-10-13A5J0366-01AND
2015-10-15201510220439AMND
2015-10-20201510220421AMND
2015-10-29201511050560AMND
2015-11-02201511060295AMND
2015-11-09201511130078AMND
2016-01-15201601200771AMND
2016-02-12201602170816AMND
2016-02-12201602170677AMND