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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

Marco Island Utilities

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.203 ppb440.140 ppb - 0.280 ppb
20140.305 ppb440.180 ppb - 0.480 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Result
2013-09-180.190 ppb
2013-09-190.200 ppb
2013-12-090.280 ppb
2013-12-090.140 ppb
2014-03-250.180 ppb
2014-03-250.280 ppb
2014-06-240.480 ppb
2014-08-050.280 ppb