Know Your Environment. Protect Your Health.

Cobalt

Blackland Water Supply Corporation

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

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
2015ND80ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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

Date Lab ID Result
2013-06-13Q1302358003ND
2013-06-13Q1302538001ND
2013-09-25Q1308241001ND
2013-09-25Q1308241003ND
2013-12-16Q1317765001ND
2013-12-16Q1317765003ND
2014-03-27Q1409938003ND
2014-03-27Q1409938001ND