Chromium (hexavalent)
Rowland Water District
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 | 0.0560 ppb | 2 | 2 | 0.0410 ppb - 0.0710 ppb |
2014 | 0.184 ppb | 6 | 6 | 0.0360 ppb - 0.530 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 | Lab ID | Result |
---|---|---|
2013-12-18 | 3L19061-01A | 0.0710 ppb |
2013-12-18 | 3L19061-03A | 0.0410 ppb |
2014-03-06 | 4C06049-03A | 0.530 ppb |
2014-03-06 | 4C06049-01A | 0.220 ppb |
2014-06-11 | 4F11086-03A | 0.1000 ppb |
2014-06-11 | 4F11086-01A | 0.160 ppb |
2014-09-04 | 4I04029-03A | 0.0360 ppb |
2014-09-04 | 4I04029-01A | 0.0560 ppb |