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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Holden Water Division, DPW

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.225 ppb155ND - 1.40 ppb
20150.127 ppb93ND - 0.560 ppb
2016N/A00N/A
20170.240 ppb51ND - 1.20 ppb

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 Result
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-201.40 ppb
2014-05-20ND
2014-08-200.710 ppb
2014-08-20ND
2014-08-20ND
2014-08-20ND
2014-08-200.570 ppb
2014-08-20ND
2014-08-20ND
2014-08-20ND
2014-11-190.420 ppb
2014-11-190.280 ppb
2015-02-24ND
2015-02-25ND
2015-02-25ND
2015-02-250.330 ppb
2015-02-25ND
2015-02-250.560 ppb
2015-02-250.250 ppb
2015-05-27ND
2015-05-27ND
2017-05-161.20 ppb
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND