Chromium (total)

Cedar Falls Municipal Water Utilities

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.

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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	0.163 ppb	16	8	ND - 0.400 ppb
2014	0.1000 ppb	16	4	ND - 0.400 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

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
2013-09-24	125924	0.400 ppb
2013-09-24	125908	0.400 ppb
2013-09-24	125923	0.400 ppb
2013-09-24	125920	0.200 ppb
2013-09-24	125921	ND
2013-09-24	125918	ND
2013-09-24	125902	ND
2013-09-24	125915	ND
2013-09-24	125909	0.400 ppb
2013-09-24	125906	ND
2013-09-24	125912	0.200 ppb
2013-09-24	125917	ND
2013-09-24	125914	0.200 ppb
2013-09-24	125911	0.400 ppb
2013-09-24	125905	ND
2013-09-24	125903	ND
2014-03-25	154061	ND
2014-03-25	154083	ND
2014-03-25	154079	0.400 ppb
2014-03-25	154081	ND
2014-03-25	154082	ND
2014-03-25	154067	0.400 ppb
2014-03-25	154066	ND
2014-03-25	154064	ND
2014-03-25	154065	ND
2014-03-25	154062	0.400 ppb
2014-03-25	154060	ND
2014-03-25	154063	ND
2014-03-25	154077	ND
2014-03-25	154078	ND
2014-03-25	154080	ND
2014-03-25	154084	0.400 ppb