Chromium (total)

Oswego

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	0.0222 ppb	9	1	ND - 0.200 ppb
2014	0.0200 ppb	10	1	ND - 0.200 ppb
2015	ND	7	0	ND
2016	N/A	0	0	N/A
2017	ND	1	0	ND
2018	ND	7	0	ND
2019	N/A	0	0	N/A

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
2013-07-09	22908701	ND
2013-07-09	22909201	ND
2013-07-09	22908501	0.200 ppb
2013-07-09	22908601	ND
2013-07-09	22908901	ND
2013-07-09	22908801	ND
2013-07-09	22909001	ND
2013-07-09	22909301	ND
2013-07-09	22909101	ND
2014-01-14	24484301	ND
2014-01-14	24484401	ND
2014-01-14	24484201	ND
2014-01-14	24484501	ND
2014-01-14	24484001	0.200 ppb
2014-01-14	24484101	ND
2014-01-14	24483901	ND
2014-01-14	24484701	ND
2014-01-14	24484601	ND
2014-07-10	1407684-001A	ND
2015-02-10	1502666-001A	ND
2015-02-10	1502666-002A	ND
2015-02-10	1502666-003A	ND
2015-02-10	1502666-004A	ND
2015-08-05	1508379-001A	ND
2015-08-05	1508379-002A	ND
2015-08-05	1508379-003A	ND
2017-08-25	1708N44-001A	ND
2018-01-29	1801G97-001A	ND
2018-01-29	1801G97-002A	ND
2018-01-29	1801G97-003A	ND
2018-01-29	1801G97-004A	ND
2018-08-06	1808389-001A	ND
2018-08-06	1808389-002A	ND
2018-08-06	1808389-003A	ND