Chromium (total)

Fort Atkinson Waterworks

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
2014	0.118 ppb	19	5	ND - 0.791 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	ND	5	0	ND
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	Lab ID	Result
2014-04-08	778823-11128	ND
2014-04-08	778833-11128	ND
2014-04-08	778831-11128	ND
2014-04-08	778817-11128	0.512 ppb
2014-04-08	778825-11128	ND
2014-04-08	778819-11128	0.315 ppb
2014-04-08	778827-11128	ND
2014-07-30	807118	ND
2014-07-30	807115	ND
2014-07-30	807112	ND
2014-07-30	807124	ND
2014-07-30	807121	ND
2014-10-07	824077-12670	ND
2014-10-07	824083-12670	ND
2014-10-07	824089-12670	0.791 ppb
2014-10-07	824085-12670	0.345 ppb
2014-10-07	824075-12670	ND
2014-10-07	824087-12670	0.273 ppb
2014-10-07	824081-12670	ND
2017-07-19	1005214	ND
2017-07-19	1005218	ND
2017-07-19	1005230	ND
2017-07-19	1005226	ND
2017-07-19	1005222	ND