Chromium (hexavalent)
Whitworth Water District 2
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 |
|---|---|---|---|---|
| 2014 | 0.322 ppb | 14 | 14 | 0.147 ppb - 0.609 ppb |
| 2015 | 0.327 ppb | 14 | 14 | 0.141 ppb - 0.641 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 |
|---|---|---|
| 2014-07-15 | WA97-SE1-14-13634-31789 | 0.254 ppb |
| 2014-07-15 | WA97-SE1-14-13634-31796 | 0.248 ppb |
| 2014-07-15 | WA97-SE1-14-13634-31795 | 0.320 ppb |
| 2014-07-15 | WA97-SE1-14-13634-31790 | 0.281 ppb |
| 2014-07-15 | WA97-SE1-14-13634-31797 | 0.342 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31799 | 0.320 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31788 | 0.330 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31792 | 0.609 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31787 | 0.322 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31798 | 0.296 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31800 | 0.364 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31794 | 0.339 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31791 | 0.147 ppb |
| 2014-07-16 | WA97-SE1-14-13634-31793 | 0.341 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3178 | 0.320 ppb |
| 2015-01-12 | WA97-SE2-15-01346-3172 | 0.332 ppb |
| 2015-01-12 | WA97-SE2-15-01346-3174 | 0.275 ppb |
| 2015-01-12 | WA97-SE2-15-01346-3171 | 0.318 ppb |
| 2015-01-12 | WA97-SE2-15-01346-3173 | 0.253 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3181 | 0.272 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3182 | 0.290 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3183 | 0.566 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3180 | 0.245 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3175 | 0.141 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3177 | 0.344 ppb |
| 2015-01-12 | WA97-SE1-15-01346-3176 | 0.641 ppb |
| 2015-01-13 | WA97-SE1-15-01346-3184 | 0.272 ppb |
| 2015-01-13 | WA97-SE1-15-01346-3179 | 0.302 ppb |