Chromium (hexavalent)

City of Kuna

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
2014	N/A	0	0	N/A
2015	0.740 ppb	20	20	0.130 ppb - 2.10 ppb
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
2015-03-05	201502260225AM	0.130 ppb
2015-03-05	201502260226AM	0.340 ppb
2015-03-05	201502260229AM	0.160 ppb
2015-03-05	201502260222AM	0.150 ppb
2015-03-16	201503170835AM	0.310 ppb
2015-03-16	201502260232AM	0.320 ppb
2015-03-17	201503180643AM	1.50 ppb
2015-03-17	201502260221AM	2.00 ppb
2015-03-18	201503190584AM	1.80 ppb
2015-03-18	201502260230AM	0.600 ppb
2015-09-08	201508260070AM	0.170 ppb
2015-09-08	201508260077AM	0.330 ppb
2015-09-09	201508260072AM	1.60 ppb
2015-09-09	201508260076AM	0.340 ppb
2015-09-10	201508260075AM	0.170 ppb
2015-09-17	201508260074AM	0.220 ppb
2015-09-17	201508260071AM	0.370 ppb
2015-09-29	201508260066AM	2.10 ppb
2015-09-29	201509300245AM	1.90 ppb
2015-09-29	201509300367AM	0.290 ppb