Chromium (hexavalent)
Lenoir City Utility Board
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 | 0.108 ppb | 8 | 6 | ND - 0.310 ppb |
2015 | 0.114 ppb | 8 | 7 | ND - 0.256 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 | Result |
---|---|
2014-07-01 | ND |
2014-07-30 | 0.277 ppb |
2014-07-30 | 0.0750 ppb |
2014-07-30 | 0.0510 ppb |
2014-10-08 | 0.310 ppb |
2014-10-08 | ND |
2014-10-08 | 0.0500 ppb |
2014-10-08 | 0.1000 ppb |
2015-01-13 | 0.142 ppb |
2015-01-13 | 0.0380 ppb |
2015-01-13 | ND |
2015-01-13 | 0.243 ppb |
2015-04-15 | 0.256 ppb |
2015-04-15 | 0.0470 ppb |
2015-04-15 | 0.0620 ppb |
2015-04-15 | 0.125 ppb |