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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Sweetwater 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

 

22

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0233 ppb208ND - 0.0850 ppb
20150.0420 ppb220.0400 ppb - 0.0440 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
2014-04-23201404240461AMND
2014-04-23201404240602AMND
2014-04-23201404240613AM0.0330 ppb
2014-04-23201404240415AMND
2014-04-23201404240521AM0.0830 ppb
2014-04-23201404240610AM0.0850 ppb
2014-07-16201407170546AM0.0600 ppb
2014-07-16201407170458AM0.0600 ppb
2014-07-299590-005-1240ND
2014-07-299590-007-1230ND
2014-07-299590-017-0820ND
2014-07-299590-018-0935ND
2014-07-299590-019-0915ND
2014-07-299590-004-0910ND
2014-10-14201410160195AM0.0620 ppb
2014-10-14201410160188AMND
2014-10-14201410160191AMND
2014-10-14201410160199AM0.0380 ppb
2014-10-14201410160201AM0.0440 ppb
2014-10-14201410160182AMND
2015-01-13201501150053AM0.0400 ppb
2015-01-13201501150056AM0.0440 ppb