Chromium (total)

City of Ammon

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.

MORE ABOUT THIS CONTAMINANT

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	0.460 ppb	10	10	0.400 ppb - 0.700 ppb
2014	0.430 ppb	10	8	ND - 0.700 ppb
2015	N/A	0	0	N/A
2016	1.000 ppb	2	1	ND - 2.00 ppb
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	1.33 ppb	6	4	ND - 2.00 ppb

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
2013-10-23	2918130	0.700 ppb
2013-10-23	2918330	0.400 ppb
2013-10-23	2918225	0.700 ppb
2013-10-23	2918339	0.400 ppb
2013-10-23	2918169	0.400 ppb
2013-10-23	2918347	0.400 ppb
2013-10-23	2918309	0.400 ppb
2013-10-23	2918323	0.400 ppb
2013-10-23	2918317	0.400 ppb
2013-10-23	2918139	0.400 ppb
2014-04-14	3009959	0.400 ppb
2014-04-14	3010067	0.700 ppb
2014-04-14	3010034	0.700 ppb
2014-04-14	3010014	0.400 ppb
2014-04-14	3010100	0.700 ppb
2014-04-14	3010071	0.700 ppb
2014-04-14	3010001	ND
2014-04-14	3010029	0.400 ppb
2014-04-14	3009992	ND
2014-04-14	3009984	0.300 ppb
2016-08-16	IT160821906	2.00 ppb
2016-08-16	IT160821902	ND
2019-06-10	IT190611402	2.00 ppb
2019-06-10	IT190611406	2.00 ppb
2019-06-10	NT190611406	2.00 ppb
2019-06-10	NT190611402	2.00 ppb
2019-07-01	IT190700504	ND
2019-07-16	NT190723802	ND