Chromium (hexavalent)

Metropolitan District Commission

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	0.0453 ppb	10	10	0.0340 ppb - 0.0580 ppb
2014	0.0222 ppb	10	6	ND - 0.0500 ppb
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
2013-07-17	201307180544AM	0.0420 ppb
2013-07-17	201307180750AM	0.0580 ppb
2013-07-17	201307180815AM	0.0420 ppb
2013-07-17	201307180742AM	0.0420 ppb
2013-07-17	201307180553AM	0.0340 ppb
2013-10-09	201310100524AM	0.0500 ppb
2013-10-09	201310100650AM	0.0510 ppb
2013-10-09	201310100588AM	0.0480 ppb
2013-10-09	201310100586AM	0.0470 ppb
2013-10-30	201310310173AM	0.0390 ppb
2014-01-07	201401080426AM	0.0300 ppb
2014-01-07	201401080380AM	ND
2014-01-07	201401080361AM	0.0500 ppb
2014-01-07	201401080365AM	ND
2014-01-08	201401090269AM	ND
2014-04-08	201404090429AM	ND
2014-04-08	201404090495AM	0.0340 ppb
2014-04-08	201404090545AM	0.0440 ppb
2014-04-08	201404090441AM	0.0300 ppb
2014-04-09	201404100634AM	0.0340 ppb