| 측정소 | 데이터시간 | 미세먼지 | 초미세먼지 | 이산화탄소 | 오존 | 이산화황 | 이산화질소 |
| 새만금 | 2026-03-18 03:00:00 | 46.0㎍/㎥ (2) | 33.0㎍/㎥ (3) | 0.3ppm (1) | 0.048ppm (2) | 0.002ppm (1) | 0.008ppm (1) |
| 새솔동 | 2026-03-18 03:00:00 | 92.0㎍/㎥ (2) | 58.0㎍/㎥ (3) | 0.6ppm (1) | 0.019ppm (1) | 0.004ppm (1) | 0.025ppm (1) |
| 서강동 | 2026-03-18 03:00:00 | 24.0㎍/㎥ (1) | 21.0㎍/㎥ (1) | 0.4ppm (1) | 0.035ppm (2) | 0.002ppm (1) | 0.012ppm (1) |
| 서대문구 | 2026-03-18 03:00:00 | 74.0㎍/㎥ (2) | 54.0㎍/㎥ (3) | 0.7ppm (1) | 0.021ppm (1) | 0.004ppm (1) | 0.042ppm (2) |
| 서면 | 2026-03-18 03:00:00 | 36.0㎍/㎥ (2) | 26.0㎍/㎥ (2) | 0.4ppm (1) | 0.038ppm (2) | 0.004ppm (1) | 0.01ppm (1) |
| 서변동 | 2026-03-18 03:00:00 | 45.0㎍/㎥ (2) | 36.0㎍/㎥ (2) | 0.4ppm (1) | 0.023ppm (1) | 0.002ppm (1) | 0.018ppm (1) |
| 서석동 | 2026-03-18 03:00:00 | 32.0㎍/㎥ (2) | 22.0㎍/㎥ (2) | 0.3ppm (1) | 0.041ppm (2) | 0.003ppm (1) | 0.015ppm (1) |
| 서신면 | 2026-03-18 03:00:00 | 92.0㎍/㎥ (2) | 64.0㎍/㎥ (3) | 0.5ppm (1) | 0.034ppm (2) | 0.004ppm (1) | 0.015ppm (1) |
| 서창 | 2026-03-18 03:00:00 | 71.0㎍/㎥ (2) | 50.0㎍/㎥ (3) | 0.7ppm (1) | 0.003ppm (1) | 0.004ppm (1) | 0.052ppm (2) |
| 서천읍 | 2026-03-18 03:00:00 | 60.0㎍/㎥ (2) | 35.0㎍/㎥ (3) | 0.4ppm (1) | 0.032ppm (2) | 0.004ppm (1) | 0.009ppm (1) |