Chromium (hexavalent)
Zion
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 | 0.177 ppb | 8 | 8 | 0.155 ppb - 0.203 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 |
---|---|---|
2015-01-21 | 840098-13262 | 0.155 ppb |
2015-01-21 | 840100-13262 | 0.198 ppb |
2015-04-20 | 855141-13885 | 0.159 ppb |
2015-04-20 | 855143-13885 | 0.177 ppb |
2015-07-15 | 871420-14511 | 0.203 ppb |
2015-07-15 | 871418-14511 | 0.171 ppb |
2015-10-21 | 890354-15226 | 0.190 ppb |
2015-10-21 | 890352-15226 | 0.166 ppb |