Chromium (total)

Bethel 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.

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
2014	ND	5	0	ND
2015	ND	4	0	ND
2016	ND	4	0	ND
2017	ND	5	0	ND
2018	0.600 ppb	4	4	0.400 ppb - 0.800 ppb
2019	ND	4	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
2014-05-12	186387CH	ND
2014-05-12	186388CH	ND
2014-05-12	186386CH	ND
2014-07-29	189024CH	ND
2014-07-29	189025CH	ND
2015-02-12	194165CH	ND
2015-02-12	194166CH	ND
2015-02-12	194163CH	ND
2015-02-12	194164CH	ND
2016-02-09	205077CH	ND
2016-02-09	205074CH	ND
2016-05-12	208040GE	ND
2016-05-12	208039GE	ND
2017-05-02	219540GE	ND
2017-10-23	306301GE	ND
2017-10-23	306303GE	ND
2017-10-23	306302GE	ND
2017-10-23	306304GE	ND
2018-02-06	309176GE	0.500 ppb
2018-02-06	309179GE	0.400 ppb
2018-02-06	309178GE	0.700 ppb
2018-02-06	309181GE	0.800 ppb
2019-01-29	320474GE	ND
2019-01-29	320485GE	ND
2019-01-29	320480GE	ND
2019-01-29	320490GE	ND