Chromium (total)

Salt Lake City Water System

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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129

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	0.571 ppb	37	30	ND - 2.20 ppb
2014	ND	14	0	ND
2015	ND	16	0	ND
2016	0.240 ppb	25	1	ND - 6.00 ppb
2017	N/A	0	0	N/A
2018	0.135 ppb	16	1	ND - 2.16 ppb
2019	ND	21	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	Result
2013-02-12	0.370 ppb
2013-02-12	0.360 ppb
2013-02-12	0.810 ppb
2013-02-12	ND
2013-02-12	0.850 ppb
2013-02-20	0.210 ppb
2013-05-14	ND
2013-05-14	ND
2013-05-14	0.430 ppb
2013-05-14	ND
2013-05-14	ND
2013-06-04	1.40 ppb
2013-06-04	0.780 ppb
2013-06-18	1.10 ppb
2013-08-13	0.330 ppb
2013-08-13	0.830 ppb
2013-08-13	1.50 ppb
2013-08-13	ND
2013-08-13	1.10 ppb
2013-08-13	0.820 ppb
2013-08-13	ND
2013-08-13	0.210 ppb
2013-08-13	0.800 ppb
2013-08-13	0.820 ppb
2013-08-13	2.20 ppb
2013-08-13	1.50 ppb
2013-08-13	0.660 ppb
2013-08-13	0.390 ppb
2013-08-13	0.300 ppb
2013-08-27	0.720 ppb
2013-08-27	0.610 ppb
2013-08-27	0.400 ppb
2013-12-03	0.220 ppb
2013-12-03	0.330 ppb
2013-12-04	0.360 ppb
2013-12-06	0.440 ppb
2013-12-18	0.280 ppb
2014-01-10	ND
2014-05-23	ND
2014-05-30	ND
2014-05-30	ND
2014-06-03	ND
2014-06-11	ND
2014-06-25	ND
2014-06-25	ND
2014-07-01	ND
2014-07-01	ND
2014-07-02	ND
2014-07-09	ND
2014-07-09	ND
2014-07-09	ND
2015-01-23	ND
2015-01-23	ND
2015-01-30	ND
2015-01-30	ND
2015-02-27	ND
2015-05-01	ND
2015-05-08	ND
2015-05-15	ND
2015-06-19	ND
2015-06-19	ND
2015-06-19	ND
2015-06-19	ND
2015-07-10	ND
2015-07-10	ND
2015-07-10	ND
2015-07-17	ND
2016-01-08	ND
2016-01-08	ND
2016-01-15	ND
2016-02-12	ND
2016-02-26	ND
2016-03-25	ND
2016-05-19	ND
2016-05-19	ND
2016-06-03	ND
2016-06-03	ND
2016-06-10	ND
2016-06-10	ND
2016-06-10	ND
2016-06-24	ND
2016-06-24	ND
2016-06-24	ND
2016-06-28	6.00 ppb
2016-06-28	ND
2016-07-08	ND
2016-07-08	ND
2016-07-13	ND
2016-07-29	ND
2016-07-29	ND
2016-07-29	ND
2016-09-08	ND
2018-05-25	ND
2018-05-25	ND
2018-06-01	ND
2018-06-01	ND
2018-06-05	2.16 ppb
2018-06-12	ND
2018-06-13	ND
2018-06-14	ND
2018-06-15	ND
2018-06-15	ND
2018-06-20	ND
2018-06-20	ND
2018-06-26	ND
2018-06-26	ND
2018-06-29	ND
2018-07-11	ND
2019-01-11	ND
2019-01-11	ND
2019-02-01	ND
2019-04-26	ND
2019-05-03	ND
2019-05-31	ND
2019-06-19	ND
2019-06-19	ND
2019-06-21	ND
2019-06-25	ND
2019-06-26	ND
2019-06-27	ND
2019-07-03	ND
2019-07-03	ND
2019-07-23	ND
2019-07-23	ND
2019-07-23	ND
2019-07-23	ND
2019-08-07	ND
2019-08-16	ND
2019-08-16	ND