Cobalt
Ruston Water System
Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.
37
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 36 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 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: 70 ppb
The EWG Health Guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-01 | 3019265 | ND |
| 2014-05-01 | 3019357 | ND |
| 2014-05-01 | 3019325 | ND |
| 2014-05-01 | 3019344 | ND |
| 2014-05-01 | 3019291 | ND |
| 2014-05-01 | 3019361 | ND |
| 2014-05-01 | 3019309 | ND |
| 2014-05-01 | 3019335 | ND |
| 2014-05-01 | 3019269 | ND |
| 2014-05-01 | 3019243 | ND |
| 2014-05-01 | 3019348 | ND |
| 2014-05-01 | 3019239 | ND |
| 2014-05-02 | 3019256 | ND |
| 2014-05-02 | 3019282 | ND |
| 2014-05-02 | 3019230 | ND |
| 2014-05-02 | 3019226 | ND |
| 2014-05-02 | 3019278 | ND |
| 2014-05-02 | 3019252 | ND |
| 2014-11-11 | 3138085 | ND |
| 2014-11-11 | 3137989 | ND |
| 2014-11-11 | 3137899 | ND |
| 2014-11-11 | 3138346 | ND |
| 2014-11-11 | 3138163 | ND |
| 2014-11-11 | 3138296 | ND |
| 2014-11-11 | 3138198 | ND |
| 2014-11-11 | 3138240 | ND |
| 2014-11-11 | 3137903 | ND |
| 2014-11-11 | 3138324 | ND |
| 2014-11-11 | 3138363 | ND |
| 2014-11-11 | 3138101 | ND |
| 2014-11-11 | 3138282 | ND |
| 2014-11-11 | 3138002 | ND |
| 2014-11-11 | 3138148 | ND |
| 2014-11-11 | 3138179 | ND |
| 2014-11-11 | 3138320 | ND |
| 2014-12-22 | 3161205 | ND |
| 2015-01-12 | 3168377 | ND |