Know Your Environment. Protect Your Health.

Chromium (hexavalent)

King County Water District 111

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).

 

16

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0388 ppb83ND - 0.150 ppb
20140.0488 ppb83ND - 0.190 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2013-08-202881758ND
2013-08-202881745ND
2013-08-2028812980.0600 ppb
2013-08-2028814710.1000 ppb
2013-08-202881764ND
2013-08-2028817340.150 ppb
2013-08-202881292ND
2013-08-202881464ND
2014-02-252981160ND
2014-02-2529811440.190 ppb
2014-02-2529810760.0500 ppb
2014-02-2529810500.150 ppb
2014-02-252981176ND
2014-02-252981055ND
2014-02-252981088ND
2014-02-252981135ND