Chromium (total)

City of Athens

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	7	0	ND
2014	0.0955 ppb	13	3	ND - 0.800 ppb
2015	0.705 ppb	2	2	0.410 ppb - 1.000 ppb
2016	N/A	0	0	N/A
2017	ND	1	0	ND
2018	ND	2	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
2013-12-17	Q1318389015	ND
2013-12-17	Q1318389013	ND
2013-12-17	Q1318389001	ND
2013-12-17	Q1318389003	ND
2013-12-17	Q1318389007	ND
2013-12-17	Q1318389005	ND
2013-12-17	Q1318389009	ND
2014-03-11	Q1407622001	ND
2014-03-11	Q1407622003	ND
2014-06-16	Q1421298011	ND
2014-06-16	Q1421298015	ND
2014-06-16	Q1421298013	ND
2014-06-16	Q1421298001	ND
2014-06-16	Q1421298003	ND
2014-06-16	Q1421298009	ND
2014-06-16	Q1421298007	ND
2014-06-16	Q1421298005	ND
2014-07-24	Q1430758002	0.800 ppb
2014-09-16	Q1444583003	0.212 ppb
2014-09-16	Q1444583001	0.229 ppb
2015-02-04	Q1504432013	0.410 ppb
2015-02-04	Q1504432012	1.000 ppb
2017-10-02	Q1748075013	ND
2018-05-17	AE28155	ND
2018-05-17	AE28156	ND