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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Carson City Public Works

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.

 

57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013ND50ND
20140.240 ppb148ND - 0.880 ppb
20150.173 ppb167ND - 0.860 ppb
2016ND30ND
2017ND90ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2012-06-21201206220321-IND
2012-06-25201206270244-IND
2012-06-25201206270216-IND
2012-07-11201207130064-IND
2012-08-08201208100396-IND
2012-09-18201209200453-IND
2012-10-02201210030297-IND
2012-10-22201210230058-IND
2012-11-13201211150453-IND
2012-12-19201212200202ND
2013-06-18201306190582-IND
2013-06-26201306270194-IND
2013-07-18201307200001-IND
2013-09-09201309100461-IND
2013-09-25201309260254-IND
2014-05-27201405280593-IND
2014-07-01201407020365ND
2014-07-01201407020366ND
2014-07-01201407020367ND
2014-08-11201408130877AM0.580 ppb
2014-08-11201408130733AM0.250 ppb
2014-08-11201408130731AMND
2014-08-12201408130810AMND
2014-08-12201408130822AM0.220 ppb
2014-08-12201408130669AM0.480 ppb
2014-08-12201408130686AM0.240 ppb
2014-08-12201408130648AM0.880 ppb
2014-11-24201411250372AM0.280 ppb
2014-11-24201411250342AM0.430 ppb
2015-02-23201502240536AM0.860 ppb
2015-02-23201502240530AMND
2015-02-23201502240586AM0.480 ppb
2015-02-23201502240532AM0.270 ppb
2015-02-24201502250934AM0.210 ppb
2015-02-24201502250721AM0.360 ppb
2015-02-24201502250915AM0.240 ppb
2015-05-12201505130627AMND
2015-05-12201505130289AM0.350 ppb
2015-06-29201506300124-IOCND
2015-06-29201506300177-IOCND
2015-07-14201507150299ND
2015-07-15201507160255ND
2015-08-10201508110263ND
2015-09-15201509020134ND
2015-09-24201509250182ND
2016-06-22201606230265ND
2016-06-22201606230267ND
2016-08-10201608110453ND
2017-05-15201705160867ND
2017-05-15201705160571ND
2017-05-15201705160632ND
2017-05-16201705170491ND
2017-05-16201705170782ND
2017-05-16201705170304ND
2017-05-23201705240962ND
2017-05-25201705260591ND
2017-07-05201707060865ND