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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Farmington City 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.

 

14

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
2013ND30ND
2014N/A00N/A
20150.138 ppb83ND - 0.700 ppb
2016ND30ND
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
2013-11-05ND
2013-11-05ND
2013-11-06ND
2015-03-260.700 ppb
2015-03-26ND
2015-06-03ND
2015-06-03ND
2015-09-100.200 ppb
2015-10-22ND
2015-12-090.200 ppb
2015-12-09ND
2016-02-03ND
2016-02-10ND
2016-09-13ND