Delhi vs Tiruchirappalli
Side-by-side air quality comparison between Delhi 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 | Delhi | Tiruchirappalli |
|---|---|---|
| PM2.5(µg/m³) | 78.20 | 5.40 |
| PM10(µg/m³) | 154.10 | 6.60 |
| NO₂(µg/m³) | 47.90 | 7.20 |
| SO₂(µg/m³) | 33.40 | 3.10 |
| O₃(µg/m³) | 43.00 | 38.00 |
| CO(µg/m³) | 545.00 | 134.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Delhi averaged an AQI of 210 while Tiruchirappalli averaged 50 — a 160-point (320%) gap, with Delhi 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 316 AQI points.
Seasonality & days
Delhi peaks in November, while Tiruchirappalli peaks in January. Delhi logged 18.7% Severe days and 1.7% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Delhi 3 days, Tiruchirappalli 46 days.
Year-over-year progress
Delhi has improved by 42 AQI points (16.7%) from 2016 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Delhi reached AQI 500 at Ashok Vihar (DPCC) on 2024-11-18; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Delhi spans 39 CPCB stations with a 84-point spread (min 178, max 262); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Tiruchirappalli has better air quality with an AQI of 9 compared to Delhi's 161. That's a significant difference of 152 points.