Belgaum vs Chennai
Side-by-side air quality comparison between Belgaum and Chennai.
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 | Belgaum | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 11.10 | 11.70 |
| PM10(µg/m³) | 19.90 | 13.10 |
| NO₂(µg/m³) | 6.70 | 14.20 |
| SO₂(µg/m³) | 1.40 | 10.10 |
| O₃(µg/m³) | 38.00 | 56.00 |
| CO(µg/m³) | 113.00 | 308.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Belgaum averaged an AQI of 58 while Chennai averaged 68 — a 10-point (17%) gap, with Chennai the more polluted and Belgaum the cleaner of the two. On 439 days when both cities reported, Belgaum was cleaner on 385 of them; the average daily gap was 49 AQI points.
Seasonality & days
Belgaum peaks in January, while Chennai peaks in December. Belgaum logged 0% Severe days and 84.3% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Belgaum 71 days, Chennai 53 days.
Year-over-year progress
Belgaum has improved by 33 AQI points (36.3%) from 2022 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Belgaum reached AQI 248 at Ramteerth Nagar (KSPCB) on 2024-12-14; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Belgaum spans 1 CPCB stations with a 0-point spread (min 71, max 71); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
Both Belgaum and Chennai have the same AQI of 20 right now.