Howrah vs Koppal
Side-by-side air quality comparison between Howrah and Koppal.
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 | Koppal |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 5.90 |
| PM10(µg/m³) | 69.40 | 9.10 |
| NO₂(µg/m³) | 18.10 | 6.10 |
| SO₂(µg/m³) | 13.10 | 1.30 |
| O₃(µg/m³) | 86.00 | 38.00 |
| CO(µg/m³) | 421.00 | 124.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Koppal averaged 65 — a 61-point (94%) gap, with Howrah the more polluted and Koppal the cleaner of the two. On 909 days when both cities reported, Koppal was cleaner on 738 of them; the average daily gap was 102 AQI points.
Seasonality & days
Howrah peaks in December, while Koppal peaks in February. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Koppal was 0% Severe and 85.5% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Koppal 47 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Koppal has improved by 31 AQI points (32.3%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Koppal hit AQI 384 at Diwator Nagar (KSPCB) on 2023-02-16.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Koppal spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Koppal has better air quality with an AQI of 10 compared to Howrah's 117. That's a significant difference of 107 points.