Chromium (hexavalent)
Roy City Water System
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).
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | 0.539 ppb | 13 | 13 | 0.0453 ppb - 0.986 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 | Result |
---|---|
2015-02-23 | 0.526 ppb |
2015-02-23 | 0.525 ppb |
2015-02-23 | 0.702 ppb |
2015-02-23 | 0.888 ppb |
2015-05-27 | 0.787 ppb |
2015-05-27 | 0.190 ppb |
2015-08-27 | 0.341 ppb |
2015-08-27 | 0.779 ppb |
2015-08-27 | 0.407 ppb |
2015-08-27 | 0.986 ppb |
2015-08-27 | 0.756 ppb |
2015-11-23 | 0.0453 ppb |
2015-11-23 | 0.0777 ppb |