Coimbatore vs Delhi
Side-by-side air quality comparison between Coimbatore and Delhi.
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 | Coimbatore | Delhi |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 80.80 |
| PM10(µg/m³) | 2.90 | 143.90 |
| NO₂(µg/m³) | 4.50 | 41.80 |
| SO₂(µg/m³) | 2.20 | 33.00 |
| O₃(µg/m³) | 43.00 | 63.00 |
| CO(µg/m³) | 159.00 | 568.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Delhi averaged 210 — a 144-point (218%) gap, with Delhi the more polluted and Coimbatore the cleaner of the two. On 1005 days when both cities reported, Coimbatore was cleaner on 1003 of them; the average daily gap was 233 AQI points.
Seasonality & days
Both cities see their worst air in November on average. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Delhi was 18.7% Severe and 1.7% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Delhi 3 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Delhi has improved by 42 AQI points (16.7%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Delhi hit AQI 500 at Ashok Vihar (DPCC) on 2024-11-18.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Delhi spans 39 stations with a 84-point spread (min 178, max 262).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Delhi's 170. That's a significant difference of 165 points.