Howrah vs Kārwār
Side-by-side air quality comparison between Howrah and Kārwār.
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 | Kārwār |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 7.10 |
| PM10(µg/m³) | 72.60 | 19.60 |
| NO₂(µg/m³) | 22.20 | 0.70 |
| SO₂(µg/m³) | 11.50 | 0.40 |
| O₃(µg/m³) | 55.00 | 54.00 |
| CO(µg/m³) | 360.00 | 95.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Kārwār averaged 55 — a 71-point (129%) gap, with Howrah the more polluted and Kārwār the cleaner of the two. On 263 days when both cities reported, Kārwār was cleaner on 259 of them; the average daily gap was 107 AQI points.
Seasonality & days
Howrah peaks in December, while Kārwār peaks in January. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Kārwār was 0% Severe and 92.7% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Kārwār 34 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Kārwār has improved by 72 AQI points (56.7%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Kārwār hit AQI 222 at KHB Colony (KSPCB) on 2023-12-21.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Kārwār spans 1 stations with a 0-point spread (min 58, max 58).
Verdict
🏆 Kārwār has better air quality with an AQI of 20 compared to Howrah's 130. That's a significant difference of 110 points.