Guwahati vs Katihar
Side-by-side air quality comparison between Guwahati and Katihar.
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 | Guwahati | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 31.90 | 105.90 |
| PM10(µg/m³) | 36.00 | 109.00 |
| NO₂(µg/m³) | 5.40 | 25.20 |
| SO₂(µg/m³) | 4.20 | 20.10 |
| O₃(µg/m³) | 97.00 | 67.00 |
| CO(µg/m³) | 393.00 | 727.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Guwahati averaged an AQI of 123 while Katihar averaged 123 — a 0-point (0%) gap, with Katihar the more polluted and Guwahati the cleaner of the two. On 969 days when both cities reported, Guwahati was cleaner on 604 of them; the average daily gap was 77 AQI points.
Seasonality & days
Guwahati peaks in January, while Katihar peaks in December. Guwahati logged 0.1% Severe days and 44.9% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Guwahati 105 days, Katihar 19 days.
Year-over-year progress
Guwahati has worsened by 14 AQI points (12.8%) from 2019 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Guwahati reached AQI 420 at Railway Colony (PCBA) on 2023-01-15; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Guwahati spans 4 CPCB stations with a 26-point spread (min 118, max 144); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Guwahati has better air quality with an AQI of 54 compared to Katihar's 253. That's a significant difference of 199 points.