Chromium (total)

Moscow Water Department

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
2014	ND	10	0	ND
2015	ND	10	0	ND
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	0.224 ppb	5	1	ND - 1.12 ppb
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
2014-10-03	141003018-003	ND
2014-10-03	141003018-005	ND
2014-10-03	141003018-011	ND
2014-10-03	141003018-004	ND
2014-10-03	141003018-001	ND
2014-10-03	141003018-002	ND
2014-10-03	141003018-014	ND
2014-10-03	141003018-013	ND
2014-10-03	141003018-012	ND
2014-10-03	141003018-015	ND
2015-04-01	150401020-013	ND
2015-04-01	150401020-002	ND
2015-04-01	150401020-003	ND
2015-04-01	150401020-001	ND
2015-04-01	150401020-011	ND
2015-04-01	150401020-005	ND
2015-04-01	150401020-015	ND
2015-04-01	150401020-012	ND
2015-04-01	150401020-014	ND
2015-04-01	150401020-004	ND
2018-08-29	I180829057-003	ND
2018-08-29	I180829057-001	ND
2018-08-30	I180831013-001	1.12 ppb
2018-09-13	I180914037-001	ND
2018-09-13	I180914037-002	ND