Chromium (hexavalent)

City of Friendswood

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
2013	0.0724 ppb	30	11	ND - 1.01 ppb
2014	ND	2	0	ND
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
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
2013-05-01	3E03019-12	ND
2013-05-01	3E03019-07	0.0481 ppb
2013-05-01	3E03019-13	ND
2013-05-01	3E03019-06	0.0311 ppb
2013-05-01	3E03019-04	ND
2013-05-01	3E03019-08	ND
2013-05-01	3E03019-11	ND
2013-05-01	3E03019-10	ND
2013-05-01	3E03019-09	0.0316 ppb
2013-05-01	3E03019-01	ND
2013-05-01	3E03019-05	ND
2013-05-01	3E03019-03	0.0326 ppb
2013-05-01	3E03019-14	ND
2013-05-01	3E03019-02	1.01 ppb
2013-08-26	3H30003-01A	ND
2013-08-26	3H30003-02A	ND
2013-11-14	3K19012-11A	0.0351 ppb
2013-11-14	3K19012-14A	0.0311 ppb
2013-11-14	3K19012-10A	ND
2013-11-14	3K19012-12A	ND
2013-11-14	3K19012-13A	ND
2013-11-14	3K19012-09A	ND
2013-11-14	3K19012-05A	ND
2013-11-14	3K19012-04A	ND
2013-11-14	3K19012-06A	0.0944 ppb
2013-11-14	3K19012-02A	0.139 ppb
2013-11-14	3K19012-03A	0.0384 ppb
2013-11-14	3K19012-08A	ND
2013-11-14	3K19012-07A	0.681 ppb
2013-11-14	3K19012-01A	ND
2014-02-18	4B25006-02	ND
2014-02-18	4B25006-01	ND