Chromium (total)

Romeoville

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
2014	0.0615 ppb	13	2	ND - 0.400 ppb
2015	0.133 ppb	9	3	ND - 0.600 ppb
2016	N/A	0	0	N/A
2017	ND	7	0	ND
2018	ND	2	0	ND
2019	ND	1	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
2014-08-19	1408A70-002A	ND
2014-08-19	1408A70-003A	ND
2014-08-19	1408A70-001A	ND
2014-08-19	1408A70-004A	ND
2014-08-19	1408A70-005A	ND
2014-09-09	27046801	ND
2014-09-09	3112528	0.400 ppb
2014-09-09	27046501	ND
2014-09-09	27046601	ND
2014-09-09	27047001	ND
2014-09-09	3112557	0.400 ppb
2014-09-09	27047101	ND
2014-11-12	1411630-001A	ND
2015-03-10	28389901	0.300 ppb
2015-03-10	28389601	0.600 ppb
2015-03-10	28390201	0.300 ppb
2015-03-10	28389501	ND
2015-03-10	28389701	ND
2015-03-10	28389801	ND
2015-03-10	28390001	ND
2015-07-14	28390101	ND
2015-07-29	1507Q98-001A	ND
2017-08-09	1708882-003A	ND
2017-08-09	1708882-001A	ND
2017-08-09	1708882-002A	ND
2017-08-09	1708882-005A	ND
2017-08-09	1708880-001A	ND
2017-08-09	1708882-004A	ND
2017-08-09	1708882-006A	ND
2018-08-16	18H0910-01_01	ND
2018-11-14	18K0428-01_01	ND
2019-12-09	1911G96-001	ND