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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Freeport

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
2012ND20ND
2013N/A00N/A
20140.156 ppb53ND - 0.330 ppb
20150.0483 ppb61ND - 0.290 ppb
2016N/A00N/A
2017ND10ND

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
2012-10-172102716-01ND
2012-10-172102716-02ND
2014-04-151404931-001AND
2014-11-1735164568007AM0.330 ppb
2014-11-1735164568001AMND
2014-11-1735164568003AM0.220 ppb
2014-11-1735164568005AM0.230 ppb
2015-05-1135188125005AMND
2015-05-1135188125001AMND
2015-05-1135188125007AM0.290 ppb
2015-05-1135188125003AMND
2015-10-201510H36-001AND
2015-11-231511H39-001AND
2017-04-111704932-001AND