Chromium (total)

Edmonson County Water District

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	0.110 ppb	4	2	ND - 0.240 ppb
2014	0.121 ppb	14	7	ND - 0.290 ppb
2015	ND	2	0	ND
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	ND	2	0	ND
2019	ND	2	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
2013-12-16	201312270112AM	ND
2013-12-16	201312270102AM	0.240 ppb
2013-12-16	201312270114AM	ND
2013-12-16	201312270104AM	0.200 ppb
2014-03-11	201403121115AM	ND
2014-03-11	201403120531AM	0.260 ppb
2014-03-11	201403120564AM	0.290 ppb
2014-03-11	201403121121AM	ND
2014-04-15	4041089-01	ND
2014-04-15	4041083-01	ND
2014-06-10	201406120544AM	0.200 ppb
2014-06-10	201406120546AM	ND
2014-06-10	201406120530AM	ND
2014-08-12	201408130839AM	ND
2014-09-09	201409100875AM	0.230 ppb
2014-09-09	201409101043AM	0.220 ppb
2014-09-09	201409101045AM	0.270 ppb
2014-09-09	201409101041AM	0.230 ppb
2015-04-14	5041011-01	ND
2015-04-14	5041017-01	ND
2016-04-19	95031501	ND
2016-04-19	95031601	ND
2017-04-18	95842101	ND
2017-04-18	95842301	ND
2018-06-05	96758501	ND
2018-06-05	96758201	ND
2019-03-05	9030292-01	ND
2019-03-05	9030291-01	ND