Chromium (hexavalent)

North Edwards Water District

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

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	6.50 ppb	3	3	1.20 ppb - 10.00 ppb
2015	7.00 ppb	6	4	ND - 11.0 ppb
2016	5.74 ppb	8	4	ND - 13.0 ppb
2017	6.25 ppb	4	2	ND - 13.0 ppb
2018	N/A	0	0	N/A
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-13	5810-001-0915	8.30 ppb
2014-09-22	5810-001-0810	10.00 ppb
2014-10-27	5810-002-0815	1.20 ppb
2015-03-23	5810-002-0730	ND
2015-03-23	5810-001-0700	10.00 ppb
2015-06-30	5810-001-1430	11.0 ppb
2015-10-06	5810-001-0915	10.00 ppb
2015-12-15	5810-002-0800	ND
2015-12-15	5810-001-0745	11.0 ppb
2016-03-22	5810-001-0750	9.90 ppb
2016-03-22	5810-002-0820	ND
2016-06-27	5810-001-0810	13.0 ppb
2016-06-27	5810-002-0850	ND
2016-09-26	5810-001-1030	13.0 ppb
2016-09-26	5810-002-1000	ND
2016-12-20	5810-001-0830	10.00 ppb
2016-12-20	5810-002-0925	ND
2017-03-21	5810-001-0815	12.0 ppb
2017-03-21	5810-002-0900	ND
2017-06-20	5810-001-0900	13.0 ppb
2017-06-20	5810-002-0930	ND