Chromium (total)

Pell City Water Works

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	0.207 ppb	16	9	ND - 0.430 ppb
2014	ND	4	0	ND
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	ND	4	0	ND
2018	N/A	0	0	N/A
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
2013-01-08	700732-7866	ND
2013-01-08	700712-7866	0.296 ppb
2013-01-08	700743-7866	ND
2013-01-08	700735-7866	ND
2013-02-27	707266-8452	ND
2013-02-27	707282-8452	ND
2013-02-27	707268-8452	ND
2013-02-27	707270-8452	ND
2013-07-08	3599596001AM	0.360 ppb
2013-07-08	3599596007AM	0.430 ppb
2013-07-08	3599596005AM	0.430 ppb
2013-07-08	3599596011AM	0.280 ppb
2013-07-08	3599596003AM	0.390 ppb
2013-07-08	3599596009AM	0.430 ppb
2013-07-31	35102552004AM	0.340 ppb
2013-07-31	35102552002AM	0.360 ppb
2014-05-14	140500198-4	ND
2014-05-14	140500198-3	ND
2014-05-14	1405-00198	ND
2014-05-14	140500198-2	ND
2017-05-11	1705-00253-3	ND
2017-05-11	1705-00253-4	ND
2017-05-11	1705-00253-2	ND
2017-05-11	1705-00253-1	ND