Chromium (hexavalent)
Wellesley Water Division (MWRA)
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 | 0.0758 ppb | 20 | 18 | ND - 0.120 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 |
---|---|
2014-01-22 | 0.0600 ppb |
2014-01-22 | 0.120 ppb |
2014-01-22 | 0.0750 ppb |
2014-01-22 | 0.0780 ppb |
2014-01-22 | 0.110 ppb |
2014-01-22 | 0.0670 ppb |
2014-01-22 | ND |
2014-01-22 | 0.0750 ppb |
2014-04-23 | 0.0820 ppb |
2014-04-23 | 0.0980 ppb |
2014-07-23 | 0.0660 ppb |
2014-07-23 | 0.0770 ppb |
2014-07-23 | ND |
2014-07-23 | 0.1000 ppb |
2014-07-23 | 0.0850 ppb |
2014-07-23 | 0.0750 ppb |
2014-07-23 | 0.0810 ppb |
2014-07-23 | 0.0890 ppb |
2014-10-21 | 0.110 ppb |
2014-10-21 | 0.0680 ppb |