Chromium (total)

Jones County

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	0.0463 ppb	24	4	ND - 0.346 ppb
2015	ND	3	0	ND
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	ND	3	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
2014-02-10	304772P	ND
2014-02-10	104853P	ND
2014-02-10	104854P	ND
2014-02-10	104855P	ND
2014-02-10	104856P	ND
2014-02-10	104857P	ND
2014-02-10	304771P	ND
2014-02-10	304770P	ND
2014-02-10	304769P	ND
2014-02-10	304768P	ND
2014-05-12	307009P	0.200 ppb
2014-05-12	106930Q	ND
2014-08-12	108842P	ND
2014-08-12	308840P	ND
2014-08-12	308839P	ND
2014-08-12	308837P	ND
2014-08-12	308841P	ND
2014-08-12	108845P	ND
2014-08-12	108844P	ND
2014-08-12	108843P	0.258 ppb
2014-08-12	108846P	0.306 ppb
2014-08-12	308838P	0.346 ppb
2014-11-10	109660P	ND
2014-11-10	309737P	ND
2015-05-27	AI78253	ND
2015-05-27	AI78251	ND
2015-05-27	AI78250	ND
2018-09-26	AK02218	ND
2018-09-26	AK02222	ND
2018-09-26	AK02220	ND