Chennai vs Sirohi
Side-by-side air quality comparison between Chennai 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 | Chennai | Sirohi |
|---|---|---|
| PM2.5(µg/m³) | 13.90 | 19.80 |
| PM10(µg/m³) | 15.30 | 33.50 |
| NO₂(µg/m³) | 15.00 | 5.10 |
| SO₂(µg/m³) | 9.10 | 2.60 |
| O₃(µg/m³) | 56.00 | 50.00 |
| CO(µg/m³) | 316.00 | 131.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Sirohi averaged 89 — a 21-point (31%) gap, with Sirohi the more polluted and Chennai the cleaner of the two. On 331 days when both cities reported, Sirohi was cleaner on 220 of them; the average daily gap was 41 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Sirohi was 0% Severe and 69.2% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Sirohi 41 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Sirohi has improved by 4 AQI points (4.3%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Sirohi hit AQI 335 at Vedhaynath Colony (RSPCB) on 2024-12-26.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Sirohi spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 23 compared to Sirohi's 34.