Chromium (hexavalent)

Acton Water Supply 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
2013	0.139 ppb	28	21	ND - 0.770 ppb
2014	0.233 ppb	4	4	0.0910 ppb - 0.600 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	Result
2013-05-13	ND
2013-05-13	0.0460 ppb
2013-05-13	0.0920 ppb
2013-05-13	0.0890 ppb
2013-05-13	0.0540 ppb
2013-05-13	0.770 ppb
2013-05-13	ND
2013-05-13	0.130 ppb
2013-05-13	0.0600 ppb
2013-05-14	ND
2013-05-14	0.130 ppb
2013-05-14	ND
2013-08-13	0.150 ppb
2013-08-13	0.730 ppb
2013-08-13	0.1000 ppb
2013-08-13	0.150 ppb
2013-11-19	0.140 ppb
2013-11-19	0.0540 ppb
2013-11-19	0.0580 ppb
2013-11-19	0.150 ppb
2013-11-19	0.0480 ppb
2013-11-19	ND
2013-11-19	0.0370 ppb
2013-11-20	0.120 ppb
2013-12-03	ND
2013-12-09	0.0430 ppb
2013-12-09	0.740 ppb
2013-12-09	ND
2014-02-11	0.120 ppb
2014-02-11	0.0910 ppb
2014-02-11	0.600 ppb
2014-02-11	0.120 ppb