Chennai vs Gaya
Side-by-side air quality comparison between Chennai and Gaya.
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 | Gaya |
|---|---|---|
| PM2.5(µg/m³) | 13.90 | 57.70 |
| PM10(µg/m³) | 15.30 | 67.50 |
| NO₂(µg/m³) | 15.00 | 19.60 |
| SO₂(µg/m³) | 9.10 | 12.20 |
| O₃(µg/m³) | 56.00 | 62.00 |
| CO(µg/m³) | 316.00 | 427.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Gaya averaged 110 — a 42-point (62%) gap, with Gaya the more polluted and Chennai the cleaner of the two. On 2103 days when both cities reported, Chennai was cleaner on 1410 of them; the average daily gap was 84 AQI points.
Seasonality & days
Chennai peaks in December, while Gaya peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Gaya was 1.7% Severe and 32% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Gaya 52 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Gaya has improved by 89 AQI points (44.7%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Gaya hit AQI 500 at Collectorate (BSPCB) on 2016-10-15.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Gaya spans 3 stations with a 85-point spread (min 88, max 173).
Verdict
🏆 Chennai has better air quality with an AQI of 23 compared to Gaya's 96. That's a significant difference of 73 points.