Chapra vs Guwahati
Side-by-side air quality comparison between Chapra and Guwahati.
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 | Chapra | Guwahati |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 31.90 |
| PM10(µg/m³) | 117.10 | 36.00 |
| NO₂(µg/m³) | 42.70 | 5.40 |
| SO₂(µg/m³) | 15.30 | 4.20 |
| O₃(µg/m³) | 46.00 | 97.00 |
| CO(µg/m³) | 805.00 | 393.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Guwahati averaged 123 — a 26-point (21%) gap, with Chapra the more polluted and Guwahati the cleaner of the two. On 960 days when both cities reported, Guwahati was cleaner on 633 of them; the average daily gap was 80 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Guwahati was 0.1% Severe and 44.9% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Guwahati 105 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Guwahati has worsened by 14 AQI points (12.8%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Guwahati hit AQI 420 at Railway Colony (PCBA) on 2023-01-15.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Guwahati spans 4 stations with a 26-point spread (min 118, max 144).
Verdict
🏆 Guwahati has better air quality with an AQI of 54 compared to Chapra's 244. That's a significant difference of 190 points.