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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

North Nelson 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND80ND
2014ND80ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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 Lab ID Result
2013-09-252903668ND
2013-09-252903657ND
2013-09-252903696ND
2013-09-252903638ND
2013-12-112944630ND
2013-12-112944538ND
2013-12-112944616ND
2013-12-112944528ND
2014-03-192995000ND
2014-03-192995085ND
2014-03-192994365ND
2014-03-192994361ND
2014-06-173048237ND
2014-06-173048216ND
2014-06-173048231ND
2014-06-173048212ND