Howrah vs Imphal
Side-by-side air quality comparison between Howrah and Imphal.
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 | Imphal |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 45.80 |
| PM10(µg/m³) | 72.60 | 53.10 |
| NO₂(µg/m³) | 22.20 | 12.00 |
| SO₂(µg/m³) | 11.50 | 2.30 |
| O₃(µg/m³) | 55.00 | 33.00 |
| CO(µg/m³) | 360.00 | 414.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Imphal averaged 110 — a 16-point (15%) gap, with Howrah the more polluted and Imphal the cleaner of the two. On 551 days when both cities reported, Howrah was cleaner on 285 of them; the average daily gap was 77 AQI points.
Seasonality & days
Howrah peaks in December, while Imphal peaks in October. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Imphal was 1.1% Severe and 49.400000000000006% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Imphal 103 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Imphal has worsened by 23 AQI points (26.4%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Imphal hit AQI 500 at University Imphal (PCB) on 2024-10-11.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Imphal spans 2 stations with a 4-point spread (min 97, max 101).
Verdict
🏆 Imphal has better air quality with an AQI of 77 compared to Howrah's 130. That's a significant difference of 53 points.