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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Connecticut Water Company - Shoreline Region-chester 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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND140ND
2015ND20ND
2016ND30ND
2017ND20ND

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
2012-01-04070IOC1ND
2012-01-04071IOC1ND
2013-01-08245IOC1ND
2013-01-08247IOC1ND
2014-01-21103699PND
2014-01-21303824PND
2014-01-21103698PND
2014-01-29140130CWCFIOC1ND
2014-01-29140130CWCCIOC1ND
2014-04-22306639PND
2014-05-06106556PND
2014-07-21107770PND
2014-07-21107769PND
2014-07-22307893PND
2014-08-13BG93531IOC1ND
2014-10-20109406PND
2014-10-21309329PND
2014-12-04BH49355IOC1ND
2015-02-12BH73175IOCRND
2015-02-12BH73176IOC1ND
2016-01-27BK58356IOCRND
2016-01-27BK58353IOC1ND
2016-05-25BN40398IOC1ND
2017-01-18BX33132IOC1ND
2017-06-12BY37361IOCRND