Trend of copper in PM₂.₅ annual means across the roadside air monitoring network, 2016-2022
- Copper in PM₂.₅ (annual mean)
Trend of copper in PM₂.₅ annual means across the roadside air monitoring network, 2016-2022| Year | Copper in PM₂.₅ (annual mean) |
|---|
| 2016 | 4.7 ng/m³ |
| 2017 | 8.2 ng/m³ |
| 2018 | 8.1 ng/m³ |
| 2019 | 4 ng/m³ |
| 2020 | 6.8 ng/m³ |
| 2021 | 7.1 ng/m³ |
| 2022 | 6.5 ng/m³ |