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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Combine Water Supply Corporation

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for cobalt. Sample information shown below was taken by City of Seagoville.

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

 

8

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
2013N/A00N/A
2014N/A00N/A
20150.271 ppb81ND - 2.17 ppb
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

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for cobalt. Sample information shown below was taken by City of Seagoville.

Date Lab ID Result
2015-02-11Q1505622001ND
2015-02-11Q15056220032.17 ppb
2015-05-26Q1519032003ND
2015-05-26Q1519032001ND
2015-08-12Q1531747003ND
2015-08-12Q1531747001ND
2015-11-23Q1546440003ND
2015-11-23Q1546440001ND