Chromium (hexavalent)

Carson City Public Works

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.218 ppb	10	9	ND - 0.730 ppb
2015	0.221 ppb	9	9	0.0800 ppb - 0.550 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/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
2014-08-11	201408130731AM	0.0330 ppb
2014-08-11	201408130733AM	0.0940 ppb
2014-08-11	201408130877AM	0.340 ppb
2014-08-12	201408130669AM	0.340 ppb
2014-08-12	201408130822AM	0.0720 ppb
2014-08-12	201408130648AM	0.730 ppb
2014-08-12	201408130810AM	ND
2014-08-12	201408130686AM	0.130 ppb
2014-11-24	201411250372AM	0.0700 ppb
2014-11-24	201411250342AM	0.370 ppb
2015-02-23	201502240586AM	0.260 ppb
2015-02-23	201502240530AM	0.0870 ppb
2015-02-23	201502240536AM	0.550 ppb
2015-02-23	201502240532AM	0.110 ppb
2015-02-24	201502250915AM	0.140 ppb
2015-02-24	201502250721AM	0.300 ppb
2015-02-24	201502250934AM	0.0850 ppb
2015-05-12	201505130627AM	0.0800 ppb
2015-05-12	201505130289AM	0.380 ppb