Chromium (total)

Henry County Water & Sewer Authority

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	0.750 ppb	12	12	0.200 ppb - 4.50 ppb
2014	ND	2	0	ND
2015	ND	2	0	ND
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	ND	2	0	ND
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
2013-03-13	2793054	0.300 ppb
2013-03-13	2793068	0.200 ppb
2013-03-13	2793099	0.500 ppb
2013-06-17	2843507	0.400 ppb
2013-06-17	2843588	0.600 ppb
2013-06-17	2843551	4.50 ppb
2013-09-16	2897826	0.400 ppb
2013-09-16	2897658	0.500 ppb
2013-09-16	2897805	0.500 ppb
2013-12-19	2949378	0.400 ppb
2013-12-19	2949791	0.300 ppb
2013-12-19	2949362	0.400 ppb
2014-03-04	AI29093	ND
2014-03-04	AI29092	ND
2015-02-05	AI64285	ND
2015-02-05	AI64284	ND
2016-02-02	AJ05457	ND
2016-02-02	AJ05456	ND
2017-02-06	AJ45682	ND
2017-02-06	AJ45681	ND
2018-02-08	AJ83524	ND
2018-02-08	AJ83523	ND
2019-02-06	AK10652	ND
2019-02-06	AK10653	ND