Chromium (total)

Eunice Water System (LAWCO)

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	0.460 ppb	2	2	0.440 ppb - 0.480 ppb
2014	0.0788 ppb	8	2	ND - 0.330 ppb
2015	N/A	0	0	N/A
2016	ND	2	0	ND
2017	ND	6	0	ND
2018	5.20 ppb	2	2	5.20 ppb
2019	ND	6	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
2013-12-17	35120414003AM	0.480 ppb
2013-12-17	35120414001AM	0.440 ppb
2014-02-10	AD88945	ND
2014-02-10	AD88940	ND
2014-02-10	AD88935	ND
2014-02-10	AD88945	ND
2014-02-10	AD88940	ND
2014-02-10	AD88935	ND
2014-06-18	35142685003AM	0.300 ppb
2014-06-18	35142685001AM	0.330 ppb
2016-02-22	35231312003	ND
2016-02-22	35231312003	ND
2017-02-06	AE13035	ND
2017-02-06	AE13031	ND
2017-02-06	AE13027	ND
2017-02-06	AE13027	ND
2017-02-06	AE13031	ND
2017-02-06	AE13035	ND
2018-09-24	B1804538-001	5.20 ppb
2018-09-24	B1804538-001	5.20 ppb
2019-04-22	B1901697-003	ND
2019-04-22	B1901697-001	ND
2019-04-22	B1901697-002	ND
2019-04-22	B1901697-001	ND
2019-04-22	B1901697-003	ND
2019-04-22	B1901697-002	ND