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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Donna

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.

 

13

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
2013ND50ND
2014ND50ND
2015ND10ND
2016ND10ND
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
2013-07-23AC25477ND
2013-09-18201309200139AMND
2013-09-18201309200137AMND
2013-12-16201312170167AMND
2013-12-16201312170169AMND
2014-01-29AC40592ND
2014-03-19201403200372AMND
2014-03-19201403200374AMND
2014-07-28201407290143AMND
2014-07-28201407290154AMND
2015-01-21AC77021ND
2016-03-02AD26564ND
2017-01-10AD63882ND