Chromium (hexavalent)

Sandwich Water District

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	0.259 ppb	16	15	ND - 0.490 ppb
2015	0.225 ppb	16	16	0.0300 ppb - 0.350 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	Result
2014-12-02	0.380 ppb
2014-12-02	0.260 ppb
2014-12-02	0.220 ppb
2014-12-02	0.210 ppb
2014-12-02	0.260 ppb
2014-12-02	0.490 ppb
2014-12-02	0.200 ppb
2014-12-02	0.230 ppb
2014-12-03	ND
2014-12-03	0.330 ppb
2014-12-03	0.310 ppb
2014-12-03	0.260 ppb
2014-12-03	0.340 ppb
2014-12-03	0.270 ppb
2014-12-19	0.320 ppb
2014-12-19	0.0600 ppb
2015-06-10	0.220 ppb
2015-06-10	0.350 ppb
2015-06-10	0.180 ppb
2015-06-10	0.310 ppb
2015-06-11	0.230 ppb
2015-06-11	0.0500 ppb
2015-06-11	0.280 ppb
2015-06-11	0.350 ppb
2015-06-11	0.230 ppb
2015-06-11	0.0900 ppb
2015-06-11	0.270 ppb
2015-06-11	0.1000 ppb
2015-06-11	0.350 ppb
2015-06-11	0.0300 ppb
2015-06-15	0.270 ppb
2015-06-15	0.290 ppb