Chromium (hexavalent)
Thomson-McDuffie County W&S Comm.
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 | 0.141 ppb | 12 | 11 | ND - 0.240 ppb |
2015 | 0.0880 ppb | 4 | 4 | 0.0350 ppb - 0.120 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 |
---|---|---|
2014-05-21 | 35139238009AM | 0.230 ppb |
2014-05-21 | 35139238007AM | 0.240 ppb |
2014-05-21 | 35139238001AM | 0.130 ppb |
2014-05-21 | 35139238003AM | 0.190 ppb |
2014-08-28 | 35152912003AM | 0.1000 ppb |
2014-08-28 | 35152912007AM | 0.170 ppb |
2014-08-28 | 35152912005AM | 0.210 ppb |
2014-08-28 | 35152912001AM | 0.200 ppb |
2014-11-30 | 35166240003AM | 0.0470 ppb |
2014-11-30 | 35166240007AM | 0.0690 ppb |
2014-11-30 | 35166240005AM | 0.1000 ppb |
2014-11-30 | 35166240001AM | ND |
2015-02-17 | 35176235003AM | 0.0870 ppb |
2015-02-18 | 35176235007AM | 0.110 ppb |
2015-02-18 | 35176235005AM | 0.120 ppb |
2015-02-18 | 35176235001AM | 0.0350 ppb |