Chromium (hexavalent)

Mineola

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	0.763 ppb	6	6	0.310 ppb - 1.60 ppb
2014	0.598 ppb	6	6	0.320 ppb - 1.40 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	0.599 ppb	8	8	0.260 ppb - 1.40 ppb
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
2013-10-18	201310220248AM	0.420 ppb
2013-10-18	201310220246AM	1.50 ppb
2013-10-21	201310220244AM	0.430 ppb
2013-10-22	201310240529AM	0.320 ppb
2013-10-22	201310240531AM	0.310 ppb
2013-10-25	201310290201AM	1.60 ppb
2014-04-22	35135242001AM	0.490 ppb
2014-04-22	35135242003AM	0.520 ppb
2014-08-25	35152913005AM	1.40 ppb
2014-08-25	35152913001AM	0.460 ppb
2014-08-25	35152913004AM	0.400 ppb
2014-09-11	35155499001AM	0.320 ppb
2018-07-31	7059954002	0.320 ppb
2018-07-31	7059955001	0.260 ppb
2018-07-31	7059954001	0.420 ppb
2018-07-31	7059954003	1.20 ppb
2018-11-27	7072119001	0.350 ppb
2018-11-27	7072119003	1.40 ppb
2018-11-27	7072119002	0.350 ppb
2018-12-18	7073566001	0.490 ppb