Chromium (hexavalent)

City of San Luis

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	N/A	0	0	N/A
2015	0.0125 ppb	24	8	ND - 0.0590 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
2015-03-30	201503300314AM	ND
2015-03-30	201503300302AM	ND
2015-03-30	201503300312AM	0.0590 ppb
2015-03-30	201503300298AM	0.0350 ppb
2015-03-30	201503300300AM	ND
2015-03-30	201503300316AM	0.0390 ppb
2015-03-30	201503300318AM	0.0300 ppb
2015-03-30	201503300320AM	0.0350 ppb
2015-03-30	201503300306AM	ND
2015-03-30	201503300304AM	ND
2015-03-30	201503300310AM	ND
2015-03-30	201503300308AM	ND
2015-09-23	201509230218AM	ND
2015-09-23	201509230220AM	ND
2015-09-23	201509230224AM	ND
2015-09-23	201509230222AM	ND
2015-09-23	201509230216AM	ND
2015-09-23	201509230214AM	ND
2015-09-28	201509280127AM	0.0400 ppb
2015-09-28	201509280125AM	ND
2015-09-28	201509280129AM	0.0310 ppb
2015-09-28	201509280123AM	ND
2015-09-28	201509280131AM	ND
2015-09-28	201509280121AM	0.0320 ppb