Know Your Environment. Protect Your Health.

Chromium (hexavalent)

City of La Grande

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).

 

20

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20150.0524 ppb207ND - 0.337 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
2015-03-11WA97-SE1-15-04900-11313ND
2015-03-11WA97-SE1-15-04900-113110.204 ppb
2015-03-11WA97-SE1-15-04900-11312ND
2015-03-11WA97-SE1-15-04900-11309ND
2015-03-11WA97-SE1-15-04900-11310ND
2015-03-11WA97-SE1-15-04900-113180.115 ppb
2015-03-11WA97-SE1-15-04900-113140.0360 ppb
2015-03-11WA97-SE1-15-04900-11315ND
2015-03-11WA97-SE1-15-04900-113160.280 ppb
2015-03-11WA97-SE1-15-04900-113170.0320 ppb
2015-10-07WA97-SE2-15-22263-49592ND
2015-10-07WA97-SE2-15-22263-49591ND
2015-10-07WA97-SE2-15-22263-49590ND
2015-10-07WA97-SE2-15-22263-49589ND
2015-10-07WA97-SE2-15-22263-49584ND
2015-10-07WA97-SE2-15-22263-49583ND
2015-10-07WA97-SE2-15-22263-49587ND
2015-10-07WA97-SE2-15-22263-49586ND
2015-10-07WA97-SE2-15-22263-495850.337 ppb
2015-10-07WA97-SE2-15-22263-495880.0430 ppb