Chromium (total)

Atlanta

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	0.0275 ppb	8	1	ND - 0.220 ppb
2014	0.0410 ppb	10	2	ND - 0.210 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
2013-09-17	201309190581AM	ND
2013-09-17	201309200130AM	ND
2013-09-17	201309190579AM	ND
2013-09-17	201309200132AM	ND
2013-12-11	201312130535AM	ND
2013-12-11	201312130537AM	0.220 ppb
2013-12-11	201312130561AM	ND
2013-12-11	201312130563AM	ND
2014-02-20	AI28450	ND
2014-02-20	AI28451	ND
2014-03-12	201403140277AM	ND
2014-03-12	201403140281AM	ND
2014-03-12	201403140287AM	ND
2014-03-12	201403140283AM	ND
2014-06-09	201406110904AM	ND
2014-06-09	201406110936AM	0.210 ppb
2014-06-09	201406110944AM	0.200 ppb
2014-06-09	201406130315AM	ND
2015-02-04	AI64405	ND
2015-02-04	AI64404	ND
2016-01-27	AJ05309	ND
2016-01-27	AJ05308	ND
2017-02-23	AJ47045	ND
2017-02-23	AJ47044	ND
2018-01-31	AJ80285	ND
2018-01-31	AJ80284	ND
2019-02-04	AK10393	ND
2019-02-04	AK10394	ND