Chromium (hexavalent)

Port Washington 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
2013	0.722 ppb	9	7	ND - 3.60 ppb
2014	0.789 ppb	9	7	ND - 3.90 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	0.924 ppb	4	4	0.0400 ppb - 3.20 ppb

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
2013-08-19	201308200115AM	0.480 ppb
2013-08-19	201308200123AM	0.740 ppb
2013-08-19	201308200125AM	0.500 ppb
2013-08-19	201308200119AM	0.550 ppb
2013-08-19	201308200117AM	0.520 ppb
2013-08-19	201308200121AM	3.60 ppb
2013-08-20	201308230184AM	0.110 ppb
2013-08-20	201308230182AM	ND
2013-09-24	201309250177AM	ND
2014-02-20	35127451015AM	0.670 ppb
2014-02-20	35127451013AM	0.390 ppb
2014-02-20	35127451011AM	0.740 ppb
2014-02-20	35127451009AM	3.90 ppb
2014-02-20	35127451005AM	ND
2014-02-21	35127451003AM	0.290 ppb
2014-02-21	35127451001AM	ND
2014-02-21	35127451007AM	0.550 ppb
2014-04-07	35133827001AM	0.560 ppb
2019-02-04	7078266001	3.20 ppb
2019-02-04	7078266006	0.0460 ppb
2019-02-04	7078266009	0.0400 ppb
2019-02-19	7080022002	0.410 ppb