Howrah vs Madurai
Side-by-side air quality comparison between Howrah and Madurai.
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 | Howrah | Madurai |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 15.50 |
| PM10(µg/m³) | 69.40 | 16.70 |
| NO₂(µg/m³) | 18.10 | 19.40 |
| SO₂(µg/m³) | 13.10 | 4.80 |
| O₃(µg/m³) | 86.00 | 20.00 |
| CO(µg/m³) | 421.00 | 212.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Madurai averaged 48 — a 78-point (163%) gap, with Howrah the more polluted and Madurai the cleaner of the two. On 76 days when both cities reported, Madurai was cleaner on 76 of them; the average daily gap was 182 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Madurai was 0% Severe and 98.7% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Madurai 17 days.
Year-over-year progress
The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Madurai hit AQI 105 at Uchapatti (TNPCB) on 2024-11-26.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Madurai spans 1 stations with a 0-point spread (min 48, max 48).
Verdict
🏆 Madurai has better air quality with an AQI of 26 compared to Howrah's 117. That's a significant difference of 91 points.