Know Your Environment. Protect Your Health.

Chromium (hexavalent)

King County Water District No 90

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).

 

12

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.106 ppb65ND - 0.160 ppb
20150.0685 ppb65ND - 0.130 ppb
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
2014-07-294G30030-05A0.0960 ppb
2014-07-294G30030-03A0.160 ppb
2014-07-294G30030-07A0.120 ppb
2014-07-294G30030-01AND
2014-10-284J30021-01A0.150 ppb
2014-10-284J30021-03A0.110 ppb
2015-02-265B27033-05A0.0730 ppb
2015-02-265B27033-07A0.0390 ppb
2015-02-265B27033-01AND
2015-02-265B27033-03A0.0960 ppb
2015-04-165D17034-05A0.0730 ppb
2015-04-165D17034-01A0.130 ppb