Chromium (hexavalent)

East Niles CSD

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	0.181 ppb	14	10	ND - 0.490 ppb
2014	0.0738 ppb	8	2	ND - 0.320 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
2013-04-09	A3C2093-14A	ND
2013-04-09	A3C2093-12A	0.490 ppb
2013-04-09	A3C2093-07A	0.0480 ppb
2013-04-09	A3C2093-01A	0.420 ppb
2013-04-09	A3C2093-04A	0.220 ppb
2013-04-09	A3C2093-10A	ND
2013-07-17	A3F2343-01A	ND
2013-07-17	A3F2343-04A	ND
2013-10-16	A3J0660-01A	0.0800 ppb
2013-10-16	A3J0659-09A	0.0380 ppb
2013-10-16	A3J0659-07A	0.480 ppb
2013-10-16	A3J0659-04A	0.240 ppb
2013-10-16	A3J0659-01A	0.450 ppb
2013-10-16	A3J0660-04A	0.0740 ppb
2014-01-14	A4A0001-01A	ND
2014-01-14	A4A0001-03A	ND
2014-12-11	5806-029-1140	0.320 ppb
2014-12-11	5806-024-0950	0.270 ppb
2014-12-11	5806-013-1000	ND
2014-12-11	5806-010-0945	ND
2014-12-11	5806-006-1120	ND
2014-12-12	5806-011-1455	ND