Shillong vs Thiruvananthapuram
Side-by-side air quality comparison between Shillong and Thiruvananthapuram.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Shillong | Thiruvananthapuram |
|---|---|---|
| PM2.5(µg/m³) | 17.90 | 5.30 |
| PM10(µg/m³) | 21.40 | 9.50 |
| NO₂(µg/m³) | 3.10 | 1.50 |
| SO₂(µg/m³) | 6.20 | 0.40 |
| O₃(µg/m³) | 118.00 | 38.00 |
| CO(µg/m³) | 304.00 | 102.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Shillong averaged an AQI of 75 while Thiruvananthapuram averaged 56 — a 19-point (34%) gap, with Shillong the more polluted and Thiruvananthapuram the cleaner of the two. On 988 days when both cities reported, Shillong was cleaner on 756 of them; the average daily gap was 31 AQI points.
Seasonality & days
Shillong peaks in February, while Thiruvananthapuram peaks in January. Shillong logged 0% Severe days and 92% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Shillong 113 days, Thiruvananthapuram 172 days.
Year-over-year progress
Shillong has worsened by 41 AQI points (120.6%) from 2019 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Shillong reached AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Shillong spans 2 CPCB stations with a 2-point spread (min 42, max 44); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).
Verdict
🏆 Thiruvananthapuram has better air quality with an AQI of 10 compared to Shillong's 30.