Coimbatore vs Sirohi
Side-by-side air quality comparison between Coimbatore and Sirohi.
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 | Sirohi |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 20.00 |
| PM10(µg/m³) | 2.90 | 34.70 |
| NO₂(µg/m³) | 4.50 | 4.30 |
| SO₂(µg/m³) | 2.20 | 2.90 |
| O₃(µg/m³) | 43.00 | 51.00 |
| CO(µg/m³) | 159.00 | 127.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Sirohi averaged 89 — a 23-point (35%) gap, with Sirohi the more polluted and Coimbatore the cleaner of the two. On 266 days when both cities reported, Coimbatore was cleaner on 187 of them; the average daily gap was 40 AQI points.
Seasonality & days
Coimbatore peaks in November, while Sirohi peaks in December. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Sirohi was 0% Severe and 69.2% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Sirohi 41 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Sirohi has improved by 4 AQI points (4.3%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Sirohi hit AQI 335 at Vedhaynath Colony (RSPCB) on 2024-12-26.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Sirohi spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Sirohi's 35.