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EWG's Tap Water Database

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Chromium (total)

Grayson Utility Commission

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND10ND
2011ND10ND
2012ND10ND
2013ND10ND
20140.143 ppb74ND - 0.300 ppb
2015ND30ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)100 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-04-06201003593001ND
2011-04-12201104026001ND
2012-04-03201203935001ND
2013-04-02201304270001ND
2014-04-01201404689001ND
2014-05-27201405300374AMND
2014-05-27201405300372AMND
2014-08-12201408150286AM0.210 ppb
2014-08-12201408150288AM0.230 ppb
2014-11-18201411210216AM0.300 ppb
2014-11-18201411210214AM0.260 ppb
2015-02-03201502060285AMND
2015-02-03201502060287AMND
2015-04-07201504208001ND