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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Alameda County 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

 

78

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.104 ppb3426ND - 0.280 ppb
2015ND160ND
2016ND160ND
2017ND120ND
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
2014-03-24201403250273AM0.0640 ppb
2014-03-24201403250220AM0.0820 ppb
2014-03-24201403250197AM0.280 ppb
2014-03-24201403250222AM0.0370 ppb
2014-03-24201403250270AM0.280 ppb
2014-03-24201403250195AM0.0780 ppb
2014-03-24201403250212AM0.160 ppb
2014-06-02201406030454AM0.0760 ppb
2014-06-02201406030462AM0.0830 ppb
2014-06-02201406030460AM0.1000 ppb
2014-06-02201406030456AM0.0340 ppb
2014-06-02201406030464AM0.180 ppb
2014-06-02201406030452AM0.110 ppb
2014-06-02201406030458AM0.200 ppb
2014-07-219590-038-0955ND
2014-07-219590-041-0955ND
2014-07-229590-040-0925ND
2014-07-229590-053-0905ND
2014-09-08201409090362AM0.180 ppb
2014-09-08201409090360AM0.130 ppb
2014-09-08201409090384AM0.170 ppb
2014-09-08201409090356AM0.130 ppb
2014-09-08201409090358AM0.0330 ppb
2014-09-08201409090386AM0.190 ppb
2014-09-08201409090364AM0.160 ppb
2014-10-149590-053-1145ND
2014-10-149590-041-1025ND
2014-10-149590-040-0900ND
2014-10-149590-038-1000ND
2014-12-08201412090319AM0.0310 ppb
2014-12-08201412090317AM0.140 ppb
2014-12-08201412090321AM0.240 ppb
2014-12-08201412090323AM0.130 ppb
2014-12-08201412090325AM0.240 ppb
2015-01-279590-041-0945ND
2015-01-279590-040-1015ND
2015-01-279590-053-1047ND
2015-01-279590-038-0955ND
2015-04-219590-038-0945ND
2015-04-219590-040-0910ND
2015-04-219590-041-0935ND
2015-04-219590-053-1010ND
2015-07-069590-038-1000ND
2015-07-069590-040-1105ND
2015-07-069590-041-0921ND
2015-07-219590-053-0905ND
2015-10-209590-053-1115ND
2015-10-209590-038-1035ND
2015-10-209590-041-1025ND
2015-10-209590-040-0940ND
2016-01-199590-053-0935ND
2016-01-199590-038-0855ND
2016-01-199590-041-0910ND
2016-01-199590-040-1035ND
2016-04-269590-041-1025ND
2016-05-109590-053-0915ND
2016-05-109590-038-1100ND
2016-05-109590-040-1020ND
2016-07-119590-041-0820ND
2016-07-119590-038-0850ND
2016-07-199590-053-0955ND
2016-07-199590-040-0825ND
2016-10-049590-040-0825ND
2016-10-049590-053-0925ND
2016-10-049590-038-0905ND
2016-10-049590-041-0855ND
2017-01-179590-040-0937ND
2017-01-179590-053-1025ND
2017-01-179590-038-0925ND
2017-01-179590-041-0925ND
2017-04-189590-040-0820ND
2017-04-189590-053-0948ND
2017-04-189590-038-0925ND
2017-04-189590-041-0910ND
2017-07-179590-038-1420ND
2017-07-179590-041-1415ND
2017-07-259590-040-0915ND
2017-07-259590-053-1032ND