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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

New York City 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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND60ND
20140.0722 ppb185ND - 0.310 ppb
20150.340 ppb65ND - 0.590 ppb
2016N/A00N/A
2017N/A00N/A

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
2013-12-10201312110762AMND
2013-12-10201312110816AMND
2013-12-10201312110711AMND
2013-12-10201312110565AMND
2013-12-10201312110548AMND
2013-12-10201312110609AMND
2014-03-11201403120582AMND
2014-03-11201403120580AMND
2014-03-11201403120550AMND
2014-03-11201403120556AMND
2014-03-11201403120478AMND
2014-03-11201403120608AMND
2014-06-24201406250156AMND
2014-06-24201406250381AMND
2014-06-24201406250127AMND
2014-06-24201406250148AMND
2014-06-24201406250135AMND
2014-06-24201406250133AMND
2014-09-23201409240447AM0.240 ppb
2014-09-23201409240450AM0.310 ppb
2014-09-23201409240402AM0.230 ppb
2014-09-23201409240320AM0.250 ppb
2014-09-23201409240312AM0.270 ppb
2014-09-23201409240346AMND
2015-06-25201505020409AM0.270 ppb
2015-06-25201505020407AM0.250 ppb
2015-09-23201508080114AMND
2015-09-23201508080112AM0.590 ppb
2015-12-08201511070108AM0.350 ppb
2015-12-08201511070106AM0.580 ppb