Bidar vs Chennai
Side-by-side air quality comparison between Bidar 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 | Bidar | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 18.40 | 16.60 |
| PM10(µg/m³) | 27.50 | 18.20 |
| NO₂(µg/m³) | 10.40 | 16.20 |
| SO₂(µg/m³) | 2.80 | 9.00 |
| O₃(µg/m³) | 59.00 | 57.00 |
| CO(µg/m³) | 208.00 | 350.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bidar averaged an AQI of 85 while Chennai averaged 68 — a 17-point (25%) gap, with Bidar the more polluted and Chennai the cleaner of the two. On 563 days when both cities reported, Bidar was cleaner on 369 of them; the average daily gap was 42 AQI points.
Seasonality & days
Bidar peaks in January, while Chennai peaks in December. Bidar logged 0.1% Severe days and 72.5% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Bidar 24 days, Chennai 53 days.
Year-over-year progress
Bidar has worsened by 1 AQI points (1.2%) from 2021 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Bidar reached AQI 437 at Naubad (KSPCB) on 2022-01-25; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Bidar spans 1 CPCB stations with a 0-point spread (min 84, max 84); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 28 compared to Bidar's 31.