| Target | 9.4 - By 2030, upgrade infrastructure and retrofit industries to make them sustainable, with increased resource-use efficiency and greater adoption of clean and environmentally sound technologies and industrial processes, with all countries taking action in accordance with their respective capabilities |
| Indicator Number | 9.4.1a |
| Description | Number of Air quality monitoring stations |
| Indicator Type | State Specific |
| Department | Tamil Nadu Pollution Control Board |
| Indicator Info | None |
| Unit of Measure | Number |
| S. No. | Year | Value | Target year | Target Value | Source |
|---|---|---|---|---|---|
| 1 | 2015 | 36.0 | 2030 | - | TNPCB |
| 2 | 2016 | 36.0 | 2030 | - | TNPCB |
| 3 | 2017 | 38.0 | 2030 | - | TNPCB |
| 4 | 2018 | 38.0 | 2030 | - | TNPCB |
| 5 | 2019 | 38.0 | 2030 | - | TNPCB |
| 6 | 2020 | 87.0 | 2030 | - | Tamil Nadu Pollution Control Board |
| 7 | 2021 | 87.0 | 2030 | - | TNPCB |
| 8 | 2022 | 87.0 | 2030 | - | Tamil Nadu Pollution Control Board |