Chromium (hexavalent)

Lakeside WD

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	0.0204 ppb	9	4	ND - 0.0630 ppb
2015	0.0131 ppb	9	3	ND - 0.0420 ppb
2016	0.933 ppb	3	1	ND - 2.80 ppb
2017	ND	2	0	ND
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
2014-09-16	4I17069-03A	0.0560 ppb
2014-09-16	4I17069-01A	ND
2014-09-16	4I17069-05A	0.0340 ppb
2014-09-16	4I17069-07A	0.0630 ppb
2014-12-08	4L09077-01A	0.0310 ppb
2014-12-08	4L09077-03A	ND
2014-12-15	9469-002-1300	ND
2014-12-15	9469-009-1300	ND
2014-12-15	9469-016-1300	ND
2015-03-11	5C12005-01A	0.0360 ppb
2015-03-11	5C12005-07A	0.0400 ppb
2015-03-11	5C12005-03A	ND
2015-03-11	5C12005-05A	ND
2015-05-11	5E12108-01A	ND
2015-05-11	5E12108-03A	0.0420 ppb
2015-12-14	9469-016-0830	ND
2015-12-14	9469-009-0900	ND
2015-12-14	9469-002-0800	ND
2016-12-19	9469-016-1100	2.80 ppb
2016-12-19	9469-009-1100	ND
2016-12-19	9469-002-1100	ND
2017-12-18	9469-002-1100	ND
2017-12-18	9469-016-1200	ND