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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Magna Water District

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.

 

10

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
20130.343 ppb880.207 ppb - 0.512 ppb
20140.430 ppb220.385 ppb - 0.474 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

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
2013-04-080.248 ppb
2013-05-020.303 ppb
2013-05-020.207 ppb
2013-07-090.349 ppb
2013-07-250.293 ppb
2013-10-150.420 ppb
2013-10-150.512 ppb
2013-10-150.409 ppb
2014-01-130.474 ppb
2014-01-130.385 ppb