Chromium (hexavalent)

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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
2013	0.0322 ppb	24	6	ND - 0.223 ppb
2014	N/A	0	0	N/A
2015	N/A	0	0	N/A
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
2013-04-15	714516-8589	0.223 ppb
2013-04-15	714500-8589	ND
2013-04-15	714506-8589	ND
2013-04-15	714508-8589	0.159 ppb
2013-04-15	714519-8589	ND
2013-04-15	714491-8589	ND
2013-04-16	715067-8675	ND
2013-04-16	715065-8671	ND
2013-04-16	715094-8675	0.0510 ppb
2013-04-16	715063-8671	ND
2013-04-16	715135-8675	ND
2013-04-16	715069-8675	ND
2013-10-09	751790-10011	0.132 ppb
2013-10-09	751793-10011	ND
2013-10-09	751702-9999	ND
2013-10-09	751698-9999	0.170 ppb
2013-10-09	751807-10011	ND
2013-10-09	751704-10011	ND
2013-10-09	751700-9999	ND
2013-10-09	751714-10011	ND
2013-10-09	751708-10011	ND
2013-10-09	751706-10011	0.0380 ppb
2013-10-10	751997-10020	ND
2013-10-10	751995-10020	ND