Howrah vs Muzaffarpur
Side-by-side air quality comparison between Howrah and Muzaffarpur.
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 | Muzaffarpur |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 120.10 |
| PM10(µg/m³) | 72.60 | 136.40 |
| NO₂(µg/m³) | 22.20 | 64.00 |
| SO₂(µg/m³) | 11.50 | 18.40 |
| O₃(µg/m³) | 55.00 | 0.00 |
| CO(µg/m³) | 360.00 | 972.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Muzaffarpur averaged 151 — a 25-point (20%) gap, with Muzaffarpur the more polluted and Howrah the cleaner of the two. On 2153 days when both cities reported, Howrah was cleaner on 1530 of them; the average daily gap was 62 AQI points.
Seasonality & days
Howrah peaks in December, while Muzaffarpur peaks in January. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Muzaffarpur was 4.5% Severe and 30.900000000000002% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Muzaffarpur 26 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Muzaffarpur has improved by 62 AQI points (29.1%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Muzaffarpur hit AQI 482 at Collectorate (BSPCB) on 2016-01-01.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Muzaffarpur spans 3 stations with a 14-point spread (min 171, max 185).
Verdict
🏆 Howrah has better air quality with an AQI of 130 compared to Muzaffarpur's 301. That's a significant difference of 171 points.