Chromium (hexavalent)
Erwin Utilities
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 | 0.265 ppb | 8 | 8 | 0.160 ppb - 0.460 ppb |
| 2015 | 0.257 ppb | 16 | 16 | 0.170 ppb - 0.420 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 | Result |
|---|---|
| 2014-10-22 | 0.170 ppb |
| 2014-10-22 | 0.460 ppb |
| 2014-10-22 | 0.260 ppb |
| 2014-10-22 | 0.160 ppb |
| 2014-10-22 | 0.180 ppb |
| 2014-10-22 | 0.300 ppb |
| 2014-10-22 | 0.240 ppb |
| 2014-10-22 | 0.350 ppb |
| 2015-01-22 | 0.280 ppb |
| 2015-01-22 | 0.370 ppb |
| 2015-01-22 | 0.240 ppb |
| 2015-01-22 | 0.170 ppb |
| 2015-04-23 | 0.180 ppb |
| 2015-04-23 | 0.170 ppb |
| 2015-04-23 | 0.230 ppb |
| 2015-04-23 | 0.190 ppb |
| 2015-04-23 | 0.330 ppb |
| 2015-04-23 | 0.220 ppb |
| 2015-04-23 | 0.320 ppb |
| 2015-04-23 | 0.420 ppb |
| 2015-07-23 | 0.240 ppb |
| 2015-07-23 | 0.170 ppb |
| 2015-07-23 | 0.330 ppb |
| 2015-07-23 | 0.250 ppb |