Patna vs Tiruchirappalli
Side-by-side air quality comparison between Patna and Tiruchirappalli.
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 | Tiruchirappalli |
|---|---|---|
| PM2.5(µg/m³) | 51.90 | 3.80 |
| PM10(µg/m³) | 78.00 | 4.70 |
| NO₂(µg/m³) | 0.60 | 1.00 |
| SO₂(µg/m³) | 7.70 | 1.70 |
| O₃(µg/m³) | 193.00 | 94.00 |
| CO(µg/m³) | 283.00 | 114.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Patna averaged an AQI of 172 while Tiruchirappalli averaged 50 — a 122-point (244%) gap, with Patna the more polluted and Tiruchirappalli the cleaner of the two. On 88 days when both cities reported, Tiruchirappalli was cleaner on 88 of them; the average daily gap was 245 AQI points.
Seasonality & days
Patna peaks in December, while Tiruchirappalli peaks in January. Patna logged 7.5% Severe days and 19.400000000000002% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Patna 30 days, Tiruchirappalli 46 days.
Year-over-year progress
Patna has improved by 40 AQI points (18.9%) from 2016 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Patna reached AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Patna spans 6 CPCB stations with a 39-point spread (min 154, max 193); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Tiruchirappalli has better air quality with an AQI of 6 compared to Patna's 87. That's a significant difference of 81 points.