Chromium (hexavalent)

Hartford Waterworks

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	0.201 ppb	10	9	ND - 0.635 ppb
2014	0.210 ppb	10	9	ND - 0.374 ppb
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
2013-11-18	759061-10300	0.635 ppb
2013-11-18	759063-10300	0.121 ppb
2013-11-18	759067-10300	0.0640 ppb
2013-11-18	759065-10300	0.126 ppb
2013-11-18	759069-10300	ND
2013-11-25	760416-10349	0.363 ppb
2013-11-25	760412-10349	0.125 ppb
2013-11-25	760420-10349	0.0870 ppb
2013-11-25	760418-10349	0.360 ppb
2013-11-25	760414-10349	0.125 ppb
2014-05-14	785741-11341	0.0980 ppb
2014-05-14	785745-11341	0.374 ppb
2014-05-14	785743-11341	ND
2014-05-14	785747-11341	0.0740 ppb
2014-05-14	785739-11341	0.0620 ppb
2014-05-15	789263-11373	0.352 ppb
2014-05-15	789267-11373	0.346 ppb
2014-05-15	789259-11373	0.348 ppb
2014-05-15	789265-11373	0.356 ppb
2014-05-15	789261-11373	0.0920 ppb