Chromium (total)

Silver Springs Shores

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

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	1.08 ppb	20	20	0.770 ppb - 1.60 ppb
2014	0.880 ppb	5	3	ND - 1.60 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	0.800 ppb	5	5	0.300 ppb - 1.20 ppb
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

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date	Result
2013-03-07	1.60 ppb
2013-04-30	0.870 ppb
2013-04-30	0.780 ppb
2013-04-30	0.890 ppb
2013-04-30	1.40 ppb
2013-04-30	1.40 ppb
2013-04-30	0.820 ppb
2013-04-30	0.770 ppb
2013-04-30	1.20 ppb
2013-04-30	1.20 ppb
2013-09-16	0.950 ppb
2013-09-16	1.60 ppb
2013-09-16	0.890 ppb
2013-09-16	0.960 ppb
2013-09-16	0.930 ppb
2013-09-16	1.000 ppb
2013-09-16	1.30 ppb
2013-09-16	0.970 ppb
2013-09-17	1.10 ppb
2013-09-17	1.000 ppb
2014-03-25	ND
2014-03-25	1.50 ppb
2014-03-25	ND
2014-03-25	1.60 ppb
2014-03-26	1.30 ppb
2017-03-28	1.20 ppb
2017-03-28	1.10 ppb
2017-03-28	0.700 ppb
2017-03-28	0.300 ppb
2017-03-28	0.700 ppb