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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Mesa Water District

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.145 ppb220.0600 ppb - 0.230 ppb
20140.226 ppb2014ND - 0.680 ppb
2015N/A00N/A
2016ND50ND
2017ND90ND
2018ND10ND
2019ND50ND

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
2013-09-033010004823-30.0600 ppb
2013-09-043010004997-30.230 ppb
2014-01-063010004813-10.120 ppb
2014-01-063010004807-10.270 ppb
2014-01-063010004822-10.530 ppb
2014-01-063010004812-10.380 ppb
2014-01-063010004825-1ND
2014-01-063010004995-10.190 ppb
2014-01-063010004998-10.240 ppb
2014-01-063010004824-10.150 ppb
2014-05-054417-008-0830ND
2014-05-054417-014-0930ND
2014-05-054417-010-0945ND
2014-05-054417-007-0915ND
2014-06-093010004824-20.200 ppb
2014-06-093010004812-20.680 ppb
2014-06-093010004807-20.320 ppb
2014-06-093010004825-2ND
2014-06-093010004995-20.290 ppb
2014-06-093010004998-20.340 ppb
2014-06-093010004822-20.630 ppb
2014-06-093010004813-20.170 ppb
2016-02-104417-010-1025ND
2016-05-094417-012-1015ND
2016-05-114417-014-0820ND
2016-06-164417-006-0940ND
2016-09-204417-006-0915ND
2017-02-214417-040-0850ND
2017-05-084417-008-0810ND
2017-05-084417-040-0930ND
2017-06-204417-006-0810ND
2017-07-124417-006-1100ND
2017-08-244417-040-0835ND
2017-10-024417-040-0810ND
2017-10-124417-007-0810ND
2017-10-304417-006-0740ND
2018-03-074417-006-0940ND
2019-02-114417-006-0835ND
2019-05-204417-010-1000ND
2019-05-294417-014-0820ND
2019-07-094417-006-1000ND
2019-07-294417-012-0825ND