Chromium (hexavalent)
Alcoa 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 |
---|---|---|---|---|
2013 | 0.0575 ppb | 4 | 4 | 0.0460 ppb - 0.0700 ppb |
2014 | 0.0648 ppb | 4 | 4 | 0.0520 ppb - 0.0730 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 | Result |
---|---|
2013-07-10 | 0.0460 ppb |
2013-07-10 | 0.0700 ppb |
2013-10-09 | 0.0460 ppb |
2013-10-10 | 0.0680 ppb |
2014-01-08 | 0.0670 ppb |
2014-01-08 | 0.0670 ppb |
2014-04-08 | 0.0730 ppb |
2014-04-08 | 0.0520 ppb |