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EWG's Tap Water Database

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Chromium (total)

Charleston

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.

 

16

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
20131.17 ppb32ND - 1.90 ppb
20141.43 ppb98ND - 1.83 ppb
2015ND10ND

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
2010-05-0510051621-1ND
2011-04-051040550-01ND
2012-04-052040956-01ND
2013-03-2728000661.90 ppb
2013-03-2728000571.60 ppb
2013-04-023040409-01ND
2014-01-20767057-106751.83 ppb
2014-01-20767059-106751.63 ppb
2014-04-034040843-01ND
2014-04-09779404-111651.73 ppb
2014-04-09779406-111651.63 ppb
2014-07-16803707-118331.52 ppb
2014-07-16803705-118331.55 ppb
2014-10-15826033-126981.50 ppb
2014-10-15826031-126981.48 ppb
2015-04-085041387-01ND