Chromium (hexavalent)
City of West Richland
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).
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.360 ppb | 6 | 3 | ND - 1.46 ppb |
| 2014 | 0.225 ppb | 12 | 10 | ND - 1.45 ppb |
| 2015 | 0.0718 ppb | 6 | 6 | 0.0540 ppb - 0.0820 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 |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2013-10-07 | WA97-SE1-13-19288-43767 | 0.523 ppb |
| 2013-10-07 | WA97-SE1-13-19288-43768 | ND |
| 2013-10-07 | WA97-SE1-13-19288-43765 | ND |
| 2013-10-07 | WA97-SE1-13-19288-43766 | ND |
| 2013-10-07 | WA97-SE1-13-19288-43764 | 1.46 ppb |
| 2013-10-17 | WA97-SE1-13-19288-43763 | 0.177 ppb |
| 2014-01-15 | WA97-SE2-14-00933-2439 | 0.0840 ppb |
| 2014-01-15 | WA97-SE2-14-00933-2440 | 0.115 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15387 | 1.45 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15391 | 0.496 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15392 | 0.0920 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15393 | 0.0790 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15388 | ND |
| 2014-04-10 | WA97-SE2-14-06353-15386 | 0.168 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15390 | 0.0850 ppb |
| 2014-04-10 | WA97-SE2-14-06353-15389 | ND |
| 2014-07-07 | WA97-SE4-14-12445-29280 | 0.0690 ppb |
| 2014-07-07 | WA97-SE4-14-12445-29279 | 0.0690 ppb |