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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Lafourche Water District 1

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.

MORE ABOUT THIS CONTAMINANT

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND200ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-01-152958467ND
2014-01-152958620ND
2014-01-152958630ND
2014-01-152958443ND
2014-02-03AD88668ND
2014-02-03AD88668ND
2014-02-24AD89281ND
2014-02-24AD89281ND
2014-04-093005348ND
2014-04-093005383ND
2014-04-093005387ND
2014-04-093005366ND
2014-07-093059689ND
2014-07-093059719ND
2014-07-093059716ND
2014-07-093059705ND
2014-10-093120177ND
2014-10-093120300ND
2014-10-093120189ND
2014-10-093120243ND
2015-03-3135181766005ND
2015-03-3135181766005ND
2015-06-0835192498004ND
2015-06-0835192498004ND
2016-03-0135232149001ND
2016-03-0135232149001ND
2016-03-1535234393005ND
2016-03-1535234393005ND
2017-01-3135292293005ND
2017-01-3135292293005ND
2017-02-1435295627001ND
2017-02-1435295627001ND
2018-01-2535370415009ND
2018-01-2535370415009ND
2018-02-2635377894001ND
2018-02-2635377894001ND
2019-01-2935445082001ND
2019-01-2935445082001ND
2019-02-1835449374001ND
2019-02-1835449374001ND