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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Metropolitan DWID

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

MORE ABOUT THIS CONTAMINANT

 

88

Samples

0

Samples exceeding legal limit (MCL)

87

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.177 ppb4443ND - 0.620 ppb
20150.260 ppb44440.0550 ppb - 3.00 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-08-06201408070497AM0.0700 ppb
2014-08-06201408070495AM0.400 ppb
2014-08-11201408120137AM0.240 ppb
2014-08-11201408120139AM0.300 ppb
2014-08-11201408120145AM0.200 ppb
2014-08-11201408120149AM0.200 ppb
2014-08-11201408120151AM0.200 ppb
2014-08-11201408120143AM0.260 ppb
2014-08-11201408120141AM0.350 ppb
2014-08-11201408120147AM0.200 ppb
2014-08-12201408130510AM0.120 ppb
2014-08-12201408130504AM0.170 ppb
2014-08-12201408130508AM0.0960 ppb
2014-08-12201408130498AM0.110 ppb
2014-08-12201408130506AM0.230 ppb
2014-08-12201408130500AM0.180 ppb
2014-08-12201408130502AM0.110 ppb
2014-08-12201408130512AM0.220 ppb
2014-08-14201408150334AM0.0860 ppb
2014-08-14201408150338AM0.0810 ppb
2014-08-14201408150336AM0.140 ppb
2014-08-14201408150342AM0.0800 ppb
2014-08-14201408150340AM0.140 ppb
2014-08-18201408190500AM0.110 ppb
2014-08-18201408190498AM0.0990 ppb
2014-08-18201408190665AM0.240 ppb
2014-08-18201408190667AM0.110 ppb
2014-08-18201408190496AM0.1000 ppb
2014-08-18201408190663AM0.150 ppb
2014-08-19201408200439AM0.130 ppb
2014-08-19201408200433AMND
2014-08-19201408200415AM0.0720 ppb
2014-08-19201408200435AM0.0590 ppb
2014-08-19201408200419AM0.0690 ppb
2014-08-19201408200417AM0.0740 ppb
2014-08-19201408200437AM0.0650 ppb
2014-08-20201408210492AM0.320 ppb
2014-08-20201408210482AM0.200 ppb
2014-08-20201408210488AM0.250 ppb
2014-08-20201408210480AM0.620 ppb
2014-08-20201408210490AM0.160 ppb
2014-08-20201408210484AM0.220 ppb
2014-08-25201408260297AM0.250 ppb
2014-09-22201409230534AM0.300 ppb
2015-02-17201502180791AM1.60 ppb
2015-02-17201502180797AM0.210 ppb
2015-02-17201502180766AM0.280 ppb
2015-02-17201502180795AM0.120 ppb
2015-02-17201502180770AM0.280 ppb
2015-02-17201502180793AM0.130 ppb
2015-02-18201502190975AM0.120 ppb
2015-02-18201502190761AM3.00 ppb
2015-02-18201502190763AM0.130 ppb
2015-02-18201502190759AM0.140 ppb
2015-02-18201502190757AM0.200 ppb
2015-02-19201502200386AM0.0550 ppb
2015-02-19201502200211AM0.130 ppb
2015-02-19201502200213AM0.120 ppb
2015-02-19201502200207AM0.140 ppb
2015-02-19201502200384AM0.0860 ppb
2015-02-19201502200382AM0.0780 ppb
2015-02-23201502240516AM0.160 ppb
2015-02-23201502240514AM0.160 ppb
2015-02-23201502240502AM0.240 ppb
2015-02-23201502240504AM0.260 ppb
2015-02-23201502240506AM0.290 ppb
2015-02-23201502240508AM0.180 ppb
2015-02-23201502240510AM0.160 ppb
2015-02-24201502250889AM0.0660 ppb
2015-02-24201502250887AM0.360 ppb
2015-02-24201502250596AM0.200 ppb
2015-02-24201502250592AM0.220 ppb
2015-02-24201502250594AM0.140 ppb
2015-02-24201502250590AM0.130 ppb
2015-02-24201502250588AM0.200 ppb
2015-02-24201502250600AM0.180 ppb
2015-02-24201502250602AM0.270 ppb
2015-02-24201502250598AM0.130 ppb
2015-02-25201502260401AM0.0820 ppb
2015-02-25201502260403AM0.0880 ppb
2015-02-25201502260399AM0.140 ppb
2015-02-25201502260397AM0.160 ppb
2015-02-25201502260405AM0.0960 ppb
2015-03-04201503060401AM0.0650 ppb
2015-03-04201503060400AM0.120 ppb
2015-03-10201503110622AM0.160 ppb
2015-03-23201503100115AM0.280 ppb
2015-08-31201509010996AM0.0960 ppb