Bhilai vs Chennai
Side-by-side air quality comparison between Bhilai 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 | Bhilai | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 44.90 | 16.60 |
| PM10(µg/m³) | 52.30 | 18.20 |
| NO₂(µg/m³) | 45.10 | 16.20 |
| SO₂(µg/m³) | 64.50 | 9.00 |
| O₃(µg/m³) | 35.00 | 57.00 |
| CO(µg/m³) | 664.00 | 350.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bhilai averaged an AQI of 73 while Chennai averaged 68 — a 5-point (7%) gap, with Bhilai the more polluted and Chennai the cleaner of the two. On 453 days when both cities reported, Bhilai was cleaner on 294 of them; the average daily gap was 42 AQI points.
Seasonality & days
Bhilai peaks in November, while Chennai peaks in December. Bhilai logged 0% Severe days and 71.6% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Bhilai 119 days, Chennai 53 days.
Year-over-year progress
Bhilai has worsened by 8 AQI points (12.3%) from 2021 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Bhilai reached AQI 288 at Hathkhoj (CECB) on 2023-12-26; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Bhilai spans 3 CPCB stations with a 25-point spread (min 59, 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 Bhilai's 75.