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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Okeechobee Utility Authority

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20124.90 ppb114.90 ppb
2013ND10ND
20143.33 ppb65ND - 19.0 ppb
20150.289 ppb94ND - 1.70 ppb
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 Result
2012-05-104.90 ppb
2013-08-15ND
2014-05-27ND
2014-08-1119.0 ppb
2014-11-050.220 ppb
2014-11-050.220 ppb
2014-12-080.300 ppb
2014-12-080.260 ppb
2015-02-03ND
2015-02-03ND
2015-05-13ND
2015-05-130.250 ppb
2015-05-130.350 ppb
2015-05-130.300 ppb
2015-07-031.70 ppb
2015-08-06ND
2015-08-06ND
2016-08-08ND
2017-10-11ND