Chromium (total)

Cape Fear Public Utility Authority - Wilmington

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	2	0	ND
2014	0.0375 ppb	8	1	ND - 0.300 ppb
2015	ND	3	0	ND
2016	ND	3	0	ND
2017	ND	2	0	ND
2018	ND	3	0	ND
2019	ND	4	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
2013-12-05	201312060141AM	ND
2013-12-05	201312060143AM	ND
2014-03-11	201403120485AM	ND
2014-03-11	201403120409AM	ND
2014-06-09	201406100074AM	ND
2014-06-09	201406100211AM	ND
2014-09-08	201409090436AM	ND
2014-09-08	201409090331AM	0.300 ppb
2014-09-11	6587-14	ND
2014-11-12	8080-14	ND
2015-08-17		ND
2015-08-17		ND
2015-11-10		ND
2016-11-01	7316-16	ND
2016-11-01	7317-16	ND
2016-11-08	7536-16	ND
2017-10-18	3802819	ND
2017-11-07	7483-17	ND
2018-09-05	4046837	ND
2018-11-06	4112497	ND
2018-11-07	4114231	ND
2019-07-01	4341100	ND
2019-07-01	4341118	ND
2019-09-16	4424751	ND
2019-11-05	4476615	ND