Chromium (total)

City of Baker Water System

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	N/A	0	0	N/A
2015	0.0375 ppb	16	1	ND - 0.600 ppb
2016	ND	8	0	ND
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	ND	8	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
2015-03-16	3209755	ND
2015-03-16	3209703	ND
2015-03-16	3209759	ND
2015-03-16	3209687	ND
2015-03-16	3209720	ND
2015-03-16	3209697	ND
2015-03-16	3209714	ND
2015-03-16	3209672	ND
2015-09-10	3318843	ND
2015-09-10	3318816	ND
2015-09-10	3318854	ND
2015-09-10	3318858	ND
2015-09-10	3318862	ND
2015-09-10	3318833	ND
2015-09-10	3318820	0.600 ppb
2015-09-10	3318876	ND
2016-05-10	AE06299	ND
2016-05-10	AE06295	ND
2016-05-10	AE06291	ND
2016-05-10	AE06287	ND
2016-05-10	AE06299	ND
2016-05-10	AE06295	ND
2016-05-10	AE06291	ND
2016-05-10	AE06287	ND
2019-02-12	B1900637-003	ND
2019-02-12	B1900637-002	ND
2019-02-12	B1900637-001	ND
2019-02-12	B1900637-003	ND
2019-02-12	B1900637-002	ND
2019-02-12	B1900637-001	ND
2019-04-30	B1901710-001	ND
2019-04-30	B1901710-001	ND