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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Pennsylvania American Water Pittsburgh

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
20140.317 ppb64ND - 0.600 ppb
20150.436 ppb1410ND - 1.10 ppb
2016ND20ND
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
2012-01-0415601501ND
2012-01-0415596901ND
2013-01-0720735001ND
2013-01-1020735601ND
2014-01-0824419701ND
2014-01-0924420401ND
2014-10-07273471010.600 ppb
2014-10-07273470010.400 ppb
2014-10-07271116010.300 ppb
2014-10-13271128010.600 ppb
2015-01-0512344335ND
2015-01-0612344389ND
2015-01-12278988010.400 ppb
2015-01-1327897401ND
2015-01-13278987010.900 ppb
2015-01-1327898201ND
2015-04-08285797011.10 ppb
2015-04-08285805010.500 ppb
2015-04-08285803010.700 ppb
2015-04-13285806010.400 ppb
2015-07-15295761010.300 ppb
2015-07-15295767010.800 ppb
2015-07-15295745010.400 ppb
2015-08-25302855010.600 ppb
2016-01-0413812702ND
2016-01-1113812716ND
2017-01-0415587512ND
2017-01-0415587622ND