Chromium (total)

Butler County Water 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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	8	ND
2015	ND	8	ND
2016	ND	7	ND
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	4	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
2014-10-09	3122068	ND
2014-10-09	3121920	ND
2014-10-09	3121937	ND
2014-10-09	3121932	ND
2014-10-09	3121949	ND
2014-10-09	3121971	ND
2014-10-09	3122046	ND
2014-10-09	3121980	ND
2015-04-02	3219387	ND
2015-04-02	3219377	ND
2015-04-02	3219391	ND
2015-04-02	3219399	ND
2015-04-02	3219403	ND
2015-04-02	3219368	ND
2015-04-02	3219359	ND
2015-05-13	3245469	ND
2016-01-14	160114062-001	ND
2016-01-14	160114062-4	ND
2016-01-14	160114062-002	ND
2016-01-14	160114062-2	ND
2016-01-14	160114062-003	ND
2016-01-14	160114062-004	ND
2016-01-14	160114062-3	ND
2019-01-17	19010515-001	ND
2019-01-17	19010515-002	ND
2019-05-30	20105976001_IIOC	ND
2019-05-30	20105976002_IIOC	ND