Chromium (hexavalent)

Florence Water-Wastewater Department

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	0.179 ppb	12	12	0.0600 ppb - 0.390 ppb
2014	0.215 ppb	12	12	0.0800 ppb - 0.530 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	2861924	0.0600 ppb
2013-07-17	2861983	0.240 ppb
2013-07-17	2861939	0.110 ppb
2013-07-17	2861933	0.110 ppb
2013-07-17	2861947	0.180 ppb
2013-07-17	2861943	0.120 ppb
2013-07-17	2861914	0.390 ppb
2013-07-17	2861905	0.310 ppb
2013-10-15	2914472	0.120 ppb
2013-10-15	2914488	0.180 ppb
2013-12-05	2942483	0.160 ppb
2013-12-05	2942484	0.170 ppb
2014-01-23	2965586	0.200 ppb
2014-01-23	2965578	0.370 ppb
2014-01-23	2965815	0.160 ppb
2014-01-23	2965791	0.340 ppb
2014-01-23	2965590	0.140 ppb
2014-01-23	2965800	0.180 ppb
2014-01-23	2965582	0.230 ppb
2014-01-23	2965830	0.530 ppb
2014-04-16	3012992	0.160 ppb
2014-04-16	3013007	0.1000 ppb
2014-04-16	3012961	0.0900 ppb
2014-04-16	3013037	0.0800 ppb