Chromium (hexavalent)

Creek County RWD # 2

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	0.0568 ppb	6	6	0.0324 ppb - 0.106 ppb
2015	0.0689 ppb	18	17	ND - 0.277 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
2014-12-02	4L02050-01	0.0403 ppb
2014-12-02	4L02050-14	0.0324 ppb
2014-12-02	4L02050-12	0.0718 ppb
2014-12-02	4L02050-10	0.106 ppb
2014-12-02	4L02050-07	0.0372 ppb
2014-12-02	4L02050-04	0.0530 ppb
2015-03-02	5C02019-04	0.0436 ppb
2015-03-02	5C02019-01	0.0447 ppb
2015-03-02	5C02019-07	0.0360 ppb
2015-03-02	5C02019-12	0.0460 ppb
2015-03-02	5C02019-10	0.0832 ppb
2015-03-02	5C02019-14	0.0439 ppb
2015-06-01	5F01021-12	0.0449 ppb
2015-06-01	5F01021-10	0.114 ppb
2015-06-01	5F01021-07	0.0435 ppb
2015-06-01	5F01021-14	0.0411 ppb
2015-06-01	5F01021-04	0.0381 ppb
2015-06-01	5F01021-01	0.0534 ppb
2015-09-14	5I14029-04	0.0811 ppb
2015-09-14	5I14029-07	ND
2015-09-14	5I14029-01	0.128 ppb
2015-09-14	5I14029-14	0.0415 ppb
2015-09-14	5I14029-10	0.277 ppb
2015-09-14	5I14029-12	0.0806 ppb