Chromium (total)

Tinker AFB Bio-env Eng

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	7.13 ppb	46	46	1.06 ppb - 20.0 ppb
2014	3.45 ppb	11	7	ND - 9.23 ppb
2015	6.23 ppb	17	13	ND - 17.6 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	3.25 ppb	8	1	ND - 26.0 ppb
2019	ND	3	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
2013-02-06	3B06026-12	2.40 ppb
2013-02-06	3B06026-01	1.99 ppb
2013-02-06	3B06026-04	3.43 ppb
2013-02-06	3B06026-07	2.33 ppb
2013-02-06	3B06026-14	2.95 ppb
2013-02-21	3B21014-02	3.99 ppb
2013-03-05	3C05035-04	1.54 ppb
2013-03-05	3C05035-18	5.74 ppb
2013-03-05	3C05035-24	2.89 ppb
2013-03-05	3C05035-13	20.0 ppb
2013-03-05	3C05035-22	5.12 ppb
2013-03-05	3C05035-16	4.22 ppb
2013-03-05	3C05035-20	5.81 ppb
2013-03-05	3C05035-10	3.78 ppb
2013-03-05	3C05035-01	1.40 ppb
2013-03-05	3C05035-07	6.14 ppb
2013-03-16	3D16033-01	8.48 ppb
2013-04-02	3D02034-07	1.10 ppb
2013-04-02	3D02034-01	8.56 ppb
2013-04-02	3D02034-13	8.35 ppb
2013-04-02	3D02034-15	11.3 ppb
2013-04-02	3D02034-17	10.2 ppb
2013-04-16	3D16033-03	10.6 ppb
2013-05-06	3E07033-01	1.06 ppb
2013-05-06	3E07033-04	10.7 ppb
2013-08-08	3H08015-01A	1.70 ppb
2013-08-08	3H08015-10A	6.81 ppb
2013-08-08	3H08015-12A	3.46 ppb
2013-08-08	3H08015-14A	6.54 ppb
2013-08-08	3H08015-07A	2.35 ppb
2013-08-08	3H08015-04A	4.31 ppb
2013-09-04	3I04039-20A	18.4 ppb
2013-09-04	3I04039-04A	18.5 ppb
2013-09-04	3I04039-01A	1.62 ppb
2013-09-04	3I04039-07A	6.43 ppb
2013-09-04	3I04039-13A	18.9 ppb
2013-09-04	3I04039-10A	19.5 ppb
2013-09-04	3I04039-22A	18.6 ppb
2013-09-04	3I04039-24A	6.17 ppb
2013-09-04	3I04039-18A	7.61 ppb
2013-09-17	3I17046-01	9.17 ppb
2013-10-08	3J08038-01A	2.57 ppb
2013-10-08	3J08038-04A	10.5 ppb
2013-10-08	3J08038-07A	2.86 ppb
2013-10-08	3J08038-19A	7.28 ppb
2013-10-08	3J08038-15A	10.4 ppb
2014-01-30	4A30009-01	7.23 ppb
2014-01-30	4A30009-05	2.34 ppb
2014-01-30	4A30009-03	1.97 ppb
2014-04-24	4D24003-01	9.23 ppb
2014-05-22	537298	ND
2014-05-22	537297	ND
2014-05-22	537296	ND
2014-08-26	4H26011-04	5.13 ppb
2014-12-17	541592	ND
2014-12-17	541594	6.30 ppb
2014-12-17	541593	5.80 ppb
2015-04-08	5D08033-01	4.64 ppb
2015-04-08	5D08025-01	1.42 ppb
2015-07-30	545647	7.90 ppb
2015-07-30	545652	ND
2015-07-30	545648	6.40 ppb
2015-07-30	545649	ND
2015-07-30	545650	ND
2015-07-30	545651	ND
2015-07-30	545654	16.9 ppb
2015-07-30	545655	10.6 ppb
2015-07-30	545656	10.2 ppb
2015-07-30	545657	9.10 ppb
2015-07-30	545658	5.80 ppb
2015-07-30	545659	9.10 ppb
2015-07-30	545653	17.6 ppb
2015-08-04	5H04091-04	3.13 ppb
2015-08-04	5H04091-01	3.05 ppb
2018-07-24	AG24046-03	ND
2018-07-24	AG24046-01	26.0 ppb
2018-07-24	AG24046-04	ND
2018-07-24	AG24046-05	ND
2018-10-23	AJ23031-06	ND
2018-10-23	AJ23031-05	ND
2018-10-23	AJ23031-03	ND
2018-10-23	AJ23031-01	ND
2019-02-05	BB05016-01	ND
2019-03-05	BC05031-01	ND
2019-03-05	BC05031-02	ND