Chromium (hexavalent)
City of Spokane
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).
16
Samples
0
Samples exceeding legal limit (MCL)
16
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | 0.260 ppb | 16 | 16 | 0.194 ppb - 0.337 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 |
|---|---|---|
| 2015-03-23 | WA97-SE1-15-0567 | 0.275 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.283 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.277 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.209 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.253 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.194 ppb |
| 2015-03-23 | WA97-SE1-15-0567 | 0.337 ppb |
| 2015-03-31 | WA97-SE1-15-0622 | 0.286 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.257 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.260 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.260 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.222 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.250 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.264 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.207 ppb |
| 2015-10-12 | WA97-SE2-15-2228 | 0.329 ppb |