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EWG's Tap Water Database

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Chromium (total)

Clearwater Water System

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND30ND
20114.03 ppb332.70 ppb - 4.80 ppb
20123.57 ppb331.60 ppb - 4.90 ppb
20131.11 ppb102ND - 7.70 ppb
20140.478 ppb113ND - 4.60 ppb
20153.68 ppb440.220 ppb - 9.10 ppb

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 Result
2010-02-10ND
2010-02-10ND
2010-02-11ND
2011-02-162.70 ppb
2011-02-164.60 ppb
2011-02-164.80 ppb
2012-02-101.60 ppb
2012-02-104.90 ppb
2012-02-104.20 ppb
2013-02-017.70 ppb
2013-02-013.40 ppb
2013-02-01ND
2013-12-06ND
2013-12-10ND
2013-12-11ND
2013-12-16ND
2013-12-16ND
2013-12-17ND
2013-12-18ND
2014-02-134.60 ppb
2014-03-18ND
2014-03-18ND
2014-06-23ND
2014-06-23ND
2014-06-23ND
2014-06-24ND
2014-06-24ND
2014-06-24ND
2014-09-240.290 ppb
2014-10-090.370 ppb
2015-01-133.90 ppb
2015-01-139.10 ppb
2015-05-071.50 ppb
2015-08-050.220 ppb