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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Atascadero Mutual Water Company

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

 

59

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.164 ppb16160.0940 ppb - 0.320 ppb
2014N/A00N/A
2015ND130ND
2016ND140ND
2017ND10ND
2018ND20ND
2019ND130ND

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
2013-04-30201305010101AM0.150 ppb
2013-04-30201305010095AM0.1000 ppb
2013-04-30201305010097AM0.0940 ppb
2013-04-30201305010099AM0.160 ppb
2013-04-30201305010093AM0.230 ppb
2013-04-30201305010091AM0.190 ppb
2013-04-30201305010105AM0.1000 ppb
2013-04-30201305010103AM0.190 ppb
2013-10-30201310310159AM0.140 ppb
2013-10-30201310310163AM0.320 ppb
2013-10-30201310310161AM0.0970 ppb
2013-10-30201310310116AM0.240 ppb
2013-10-30201310310131AM0.110 ppb
2013-10-30201310310119AM0.240 ppb
2013-10-30201310310106AM0.140 ppb
2013-10-30201310310149AM0.120 ppb
2015-02-053761-023-0950ND
2015-02-053761-044-0835ND
2015-02-053761-050-0920ND
2015-02-053761-001-1010ND
2015-02-053761-040-1032ND
2015-02-053761-020-0845ND
2015-02-053761-016-1020ND
2015-02-053761-015-0930ND
2015-02-053761-012-1028ND
2015-02-053761-009-1036ND
2015-02-103761-042-0938ND
2015-02-103761-007-1000ND
2015-02-103761-018-0927ND
2016-05-123761-053-0934ND
2016-05-123761-054-0950ND
2016-05-263761-023-0830ND
2016-05-263761-044-0935ND
2016-05-263761-015-0820ND
2016-05-263761-050-0840ND
2016-05-263761-006-0850ND
2016-07-053761-007-1030ND
2016-07-053761-012-0820ND
2016-07-053761-018-0840ND
2016-07-283761-009-0750ND
2016-07-283761-040-0805ND
2016-07-283761-054-0845ND
2016-07-283761-053-0825ND
2017-05-163761-042-1005ND
2018-06-073761-020-1015ND
2018-09-133761-016-0850ND
2019-02-123761-023-0900ND
2019-02-143761-044-0948ND
2019-04-163761-015-0845ND
2019-04-163761-001-0900ND
2019-05-093761-006-0835ND
2019-05-163761-050-0755ND
2019-07-183761-018-1010ND
2019-07-183761-007-0950ND
2019-07-183761-009-0835ND
2019-07-183761-012-1018ND
2019-07-183761-054-0930ND
2019-07-183761-053-0905ND
2019-07-183761-040-0940ND