Chromium (total)

Water Works District #1 of Vermilion

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	ND	2	0	ND
2014	0.0817 ppb	6	2	ND - 0.260 ppb
2015	ND	8	0	ND
2016	ND	2	0	ND
2017	ND	10	0	ND
2018	N/A	0	0	N/A
2019	ND	2	0	ND

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
2013-12-10	201312120791AM	ND
2013-12-10	201312120658AM	ND
2014-06-16	201406180541AM	0.260 ppb
2014-06-16	201406180487AM	0.230 ppb
2014-07-28	AD94313	ND
2014-07-28	AD94313	ND
2014-07-28	AD94318	ND
2014-07-28	AD94318	ND
2015-01-05	AE00760	ND
2015-01-05	AE00765	ND
2015-01-05	AE00770	ND
2015-01-05	AE00755	ND
2015-01-05	AE00770	ND
2015-01-05	AE00755	ND
2015-01-05	AE00760	ND
2015-01-05	AE00765	ND
2016-08-08	35259258003	ND
2016-08-08	35259258003	ND
2017-07-10	AE15518	ND
2017-07-10	AE15514	ND
2017-07-10	AE15514	ND
2017-07-10	AE15518	ND
2017-11-27	AE20039	ND
2017-11-27	AE20043	ND
2017-11-27	AE20035	ND
2017-11-27	AE20043	ND
2017-11-27	AE20039	ND
2017-11-27	AE20035	ND
2019-06-10	B1902450-001	ND
2019-06-10	B1902450-001	ND