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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Metropolitan District Commission

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.

MORE ABOUT THIS CONTAMINANT

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014ND170ND
2015ND70ND
2016ND70ND
2017ND70ND
2018ND70ND
2019ND70ND

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
2013-07-17201307180544AMND
2013-07-17201307180553AMND
2013-07-17201307180742AMND
2013-07-17201307180815AMND
2013-07-17201307180750AMND
2013-10-09201310100588AMND
2013-10-09201310100524AMND
2013-10-09201310100650AMND
2013-10-09201310100652AMND
2013-10-09201310100586AMND
2014-01-07201401080361AMND
2014-01-07201401080426AMND
2014-01-07201401080365AMND
2014-01-07201401080380AMND
2014-01-08201401090269AMND
2014-04-08201404090545AMND
2014-04-08201404090495AMND
2014-04-08201404090429AMND
2014-04-08201404090441AMND
2014-04-09201404100634AMND
2014-09-17AC77040GEND
2014-09-17AC77039GEND
2014-09-17AC77041GEND
2014-09-17AC77043GEND
2014-09-17AC77044GEND
2014-09-17AC77045GEND
2014-09-17AC77046GEND
2015-09-09AD09453GEND
2015-09-09AD09452GEND
2015-09-09AD09451GEND
2015-09-09AD09454GEND
2015-09-09AD09446GEND
2015-09-09AD09444GEND
2015-09-09AD09445GEND
2016-08-18AD38610GEND
2016-08-18AD38609GEND
2016-08-18AD38611GEND
2016-08-18AD38617GEND
2016-08-18AD38616GEND
2016-08-18AD38613GEND
2016-08-18AD38612GEND
2017-08-14AD78147GEND
2017-08-14AD78146GEND
2017-08-14AD78148GEND
2017-08-14AD78153GEND
2017-08-14AD78154GEND
2017-08-14AD78149GEND
2017-08-14AD78150GEND
2018-07-18AE01640GEND
2018-07-18AE01631GEND
2018-07-18AE01630GEND
2018-07-18AE01632GEND
2018-07-18AE01641GEND
2018-07-18AE01637GEND
2018-07-18AE01636GEND
2019-12-03CE70735ND
2019-12-03CE70740ND
2019-12-03CE70739ND
2019-12-03CE70741ND
2019-12-03CE70733ND
2019-12-03CE70734ND
2019-12-03CE70736ND