Chromium (total)

City of Olive Branch

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	5	0	ND
2014	0.367 ppb	12	4	ND - 1.80 ppb
2015	0.700 ppb	3	3	0.600 ppb - 0.800 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	0.400 ppb	6	2	ND - 1.40 ppb
2019	1.000 ppb	1	1	1.000 ppb

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
2013-07-29	733834-9394	ND
2013-07-29	733842-9397	ND
2013-07-29	733840-9394	ND
2013-07-30	734210-9397	ND
2013-07-30	734214-9397	ND
2014-02-03	769096-10681	ND
2014-02-03	769548-10712	ND
2014-02-03	769093-10681	ND
2014-02-03	769101-10702	ND
2014-02-03	769099-10681	ND
2014-04-14	140415-013IN	1.30 ppb
2014-04-14	140415-036IN	1.80 ppb
2014-04-14	140415-015IN	ND
2014-04-14	140415-014IN	0.600 ppb
2014-04-14	140415-012IN	0.700 ppb
2014-04-14	140415-011IN	ND
2014-04-14	140415-006IN	ND
2015-03-02	150303-066IN	0.600 ppb
2015-03-02	150303-062IN	0.700 ppb
2015-03-02	150303-061IN	0.800 ppb
2018-10-01	181002-016IN	ND
2018-10-01	181002-015IN	1.40 ppb
2018-10-01	181002-014IN	ND
2018-10-01	181002-013IN	ND
2018-10-01	181002-012IN	1.000 ppb
2018-10-01	181002-011IN	ND
2019-07-09	190710-001IN	1.000 ppb