Chromium (hexavalent)
Harris County FWSD 61
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 | 0.380 ppb | 6 | 5 | ND - 0.974 ppb |
2015 | 0.144 ppb | 6 | 2 | ND - 0.834 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 |
---|---|---|
2014-09-23 | 4I30041-01 | 0.974 ppb |
2014-09-23 | 4I30041-03 | ND |
2014-09-23 | 4I30041-05 | 0.119 ppb |
2014-09-23 | 4I30041-04 | 0.535 ppb |
2014-09-23 | 4I30041-02 | 0.522 ppb |
2014-09-23 | 4I30041-06 | 0.132 ppb |
2015-03-23 | 5C27003-01 | 0.834 ppb |
2015-03-23 | 5C27003-03 | ND |
2015-03-23 | 5C27003-05 | ND |
2015-03-23 | 5C27003-04 | 0.0329 ppb |
2015-03-23 | 5C27003-06 | ND |
2015-03-23 | 5C27003-02 | ND |