Chromium (hexavalent)

City of Zephyrhills

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	1.00 ppb	16	16	0.200 ppb - 1.50 ppb
2014	1.36 ppb	15	15	0.310 ppb - 2.40 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	Result
2013-10-21	1.20 ppb
2013-10-21	0.310 ppb
2013-10-21	0.930 ppb
2013-10-21	1.50 ppb
2013-10-21	1.40 ppb
2013-10-21	0.520 ppb
2013-10-21	1.50 ppb
2013-10-21	0.940 ppb
2013-10-21	1.10 ppb
2013-10-21	1.10 ppb
2013-10-21	0.200 ppb
2013-10-21	0.930 ppb
2013-10-21	0.950 ppb
2013-10-21	1.50 ppb
2013-10-21	1.000 ppb
2013-10-21	0.980 ppb
2014-04-04	0.660 ppb
2014-04-04	1.20 ppb
2014-04-04	1.60 ppb
2014-04-04	0.310 ppb
2014-04-04	0.860 ppb
2014-04-04	2.40 ppb
2014-04-04	1.30 ppb
2014-04-04	1.80 ppb
2014-04-04	0.940 ppb
2014-04-04	2.00 ppb
2014-04-04	1.60 ppb
2014-04-04	0.850 ppb
2014-04-04	1.60 ppb
2014-04-04	1.10 ppb
2014-04-04	2.20 ppb