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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

San Juan Basin Authority

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

 

71

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND130ND
2016ND110ND
2017ND80ND
2018ND30ND
2019ND200ND

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
2014-03-049590-001-0940ND
2014-03-049590-003-1039ND
2014-03-049590-004-1105ND
2014-03-049590-005-1120ND
2014-03-049590-006-0830ND
2014-03-049590-002-1015ND
2014-03-049590-014-0905ND
2014-03-049590-015-0750ND
2014-09-039590-001-1300ND
2014-09-039590-006-1431ND
2014-09-039590-014-1450ND
2014-09-039590-005-1222ND
2014-09-039590-004-1354ND
2014-09-039590-015-1515ND
2014-09-039590-003-1338ND
2014-09-239590-002-1315ND
2015-02-039590-004-1044ND
2015-02-039590-003-1025ND
2015-02-039590-006-0900ND
2015-02-039590-002-0940ND
2015-02-039590-005-1120ND
2015-08-129590-006-1045ND
2015-08-129590-014-1055ND
2015-08-129590-005-1020ND
2015-08-129590-004-1005ND
2015-08-129590-001-1013ND
2015-08-129590-015-1108ND
2015-08-129590-003-0955ND
2015-08-129590-002-0949ND
2016-02-089590-004-1052ND
2016-02-089590-014-0852ND
2016-02-089590-003-1040ND
2016-02-089590-006-0840ND
2016-02-089590-002-1027ND
2016-02-089590-005-1110ND
2016-02-169590-015-0918ND
2016-02-169590-001-0741ND
2016-08-019590-003-0906ND
2016-08-019590-004-0945ND
2016-08-019590-002-0836ND
2017-02-099590-004-1000ND
2017-02-099590-003-0930ND
2017-02-099590-002-0850ND
2017-09-059590-001-0840ND
2017-09-059590-005-1056ND
2017-09-059590-003-0958ND
2017-09-059590-002-0910ND
2017-09-289590-004-0915ND
2018-02-219590-002-0907ND
2018-02-219590-003-0921ND
2018-02-219590-004-0940ND
2019-01-094792-005-1725ND
2019-01-094792-004-1410ND
2019-01-094792-002-1440ND
2019-01-094792-003-1500ND
2019-01-094792-001-1305ND
2019-04-094792-015-1055ND
2019-07-084792-002-1035ND
2019-07-084792-004-1020ND
2019-07-084792-001-0950ND
2019-07-084792-003-1055ND
2019-07-084792-006-1315ND
2019-07-084792-005-1400ND
2019-07-094792-015-0900ND
2019-10-154792-002-1110ND
2019-10-154792-015-0845ND
2019-10-154792-003-1135ND
2019-10-154792-006-0945ND
2019-10-154792-001-0740ND
2019-10-154792-005-1345ND
2019-10-154792-004-1025ND