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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Portales 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
2012ND10ND
20130.456 ppb98ND - 0.600 ppb
2014ND20ND
2015N/A00N/A
2016N/A00N/A
2017ND20ND

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
2012-09-112012032640ND
2013-06-1728435280.500 ppb
2013-06-1728434760.400 ppb
2013-06-1728435220.500 ppb
2013-06-1728434840.500 ppb
2013-09-051309246-004AND
2013-12-1629467040.500 ppb
2013-12-1629467080.500 ppb
2013-12-1629467300.600 ppb
2013-12-1629467170.600 ppb
2014-07-171407893-004AND
2014-07-171407894-004AND
2017-06-062017016927ND
2017-06-062017016928ND