Patna vs Shillong
Side-by-side air quality comparison between Patna and Shillong.
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 | Patna | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 97.80 | 17.90 |
| PM10(µg/m³) | 109.40 | 21.40 |
| NO₂(µg/m³) | 40.50 | 3.10 |
| SO₂(µg/m³) | 18.90 | 6.20 |
| O₃(µg/m³) | 52.00 | 118.00 |
| CO(µg/m³) | 667.00 | 304.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Patna averaged an AQI of 172 while Shillong averaged 75 — a 97-point (129%) gap, with Patna the more polluted and Shillong the cleaner of the two. On 988 days when both cities reported, Shillong was cleaner on 986 of them; the average daily gap was 176 AQI points.
Seasonality & days
Patna peaks in December, while Shillong peaks in February. Patna logged 7.5% Severe days and 19.400000000000002% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Patna 30 days, Shillong 113 days.
Year-over-year progress
Patna has improved by 40 AQI points (18.9%) from 2016 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Patna reached AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Patna spans 6 CPCB stations with a 39-point spread (min 154, max 193); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 30 compared to Patna's 227. That's a significant difference of 197 points.