Howrah vs Kochi
Side-by-side air quality comparison between Howrah and Kochi.
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 | Kochi |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 8.80 |
| PM10(µg/m³) | 69.40 | 11.60 |
| NO₂(µg/m³) | 18.10 | 8.90 |
| SO₂(µg/m³) | 13.10 | 2.70 |
| O₃(µg/m³) | 86.00 | 30.00 |
| CO(µg/m³) | 421.00 | 119.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Kochi averaged 91 — a 35-point (38%) gap, with Howrah the more polluted and Kochi the cleaner of the two. On 902 days when both cities reported, Kochi was cleaner on 634 of them; the average daily gap was 86 AQI points.
Seasonality & days
Howrah peaks in December, while Kochi peaks in January. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Kochi was 0% Severe and 70.9% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Kochi 80 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Kochi has worsened by 7 AQI points (8.3%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Kochi hit AQI 293 at Vyttila Kochi (PCB) on 2022-12-08.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Kochi spans 1 stations with a 0-point spread (min 88, max 88).
Verdict
🏆 Kochi has better air quality with an AQI of 15 compared to Howrah's 117. That's a significant difference of 102 points.