Chromium (hexavalent)

Bonney Lake Water Department

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	0.135 ppb	12	11	ND - 0.220 ppb
2014	0.192 ppb	12	11	ND - 0.410 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
2013-08-20	1308764-001B	0.110 ppb
2013-08-20	1308719-001B	0.210 ppb
2013-08-20	1308722-001B	0.0600 ppb
2013-08-20	1308721-001B	0.140 ppb
2013-08-20	1308766-001B	0.0900 ppb
2013-08-20	1308725-001B	0.130 ppb
2013-08-20	1308763-001B	0.210 ppb
2013-08-20	1308765-001B	0.220 ppb
2013-09-25	1309797-001B	ND
2013-09-25	1309798-001B	0.0800 ppb
2013-12-17	1312534-001B	0.180 ppb
2013-12-17	1312533-001B	0.190 ppb
2014-02-19	1402711-001B	0.170 ppb
2014-02-19	1402714-001B	0.220 ppb
2014-02-19	1402709-001B	0.190 ppb
2014-02-19	1402710-001B	0.170 ppb
2014-02-19	1402708-001B	0.180 ppb
2014-02-19	1402713-001B	0.280 ppb
2014-02-19	1402715-001B	0.260 ppb
2014-02-19	1402712-001B	0.140 ppb
2014-05-07	1405267-001B	0.410 ppb
2014-05-07	1405268-001B	0.130 ppb
2014-08-19	1408697-001B	0.150 ppb
2014-08-19	1408696-001B	ND