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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Jefferson County W and S District - M

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for chromium (total). Sample information shown below was taken by Toronto Public Water System.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
20130.0338 ppb61ND - 0.203 ppb
20140.142 ppb21ND - 0.284 ppb
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

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for chromium (total). Sample information shown below was taken by Toronto Public Water System.

Date Lab ID Result
2012-01-249500088489ND
2013-02-129500095220ND
2014-01-14A140124488ND
2015-01-13A150258010ND
2016-01-12A160357765ND
2017-01-24A170460587ND