Chromium (total)

City of Ocean Springs

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	7	0	ND
2014	ND	7	0	ND
2015	0.750 ppb	6	2	ND - 2.50 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	ND	5	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
2013-08-20	739064-9590	ND
2013-08-20	739051-9590	ND
2013-08-20	739062-9590	ND
2013-08-20	739087-9591	ND
2013-08-20	739091-9591	ND
2013-08-20	739089-9591	ND
2013-08-20	739085-9591	ND
2014-03-19	775916-10987	ND
2014-03-19	775953-10987	ND
2014-03-19	775918-10987	ND
2014-03-19	775920-10987	ND
2014-03-19	775913-10987	ND
2014-03-19	775911-10956	ND
2014-05-21	792068-11521	ND
2015-04-08	150409-038IN	2.00 ppb
2015-04-08	150409-037IN	ND
2015-04-08	150409-030IN	ND
2015-04-08	150409-029IN	2.50 ppb
2015-04-08	150409-028IN	ND
2015-04-08	150409-027IN	ND
2019-03-27	190328-014IN	ND
2019-03-27	190328-013IN	ND
2019-03-27	190328-012IN	ND
2019-03-27	190328-011IN	ND
2019-03-27	190328-010IN	ND