Katihar vs Patna
Side-by-side air quality comparison between Katihar and Patna.
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 | Katihar | Patna |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 97.80 |
| PM10(µg/m³) | 109.00 | 109.40 |
| NO₂(µg/m³) | 25.20 | 40.50 |
| SO₂(µg/m³) | 20.10 | 18.90 |
| O₃(µg/m³) | 67.00 | 52.00 |
| CO(µg/m³) | 727.00 | 667.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Patna averaged 172 — a 49-point (40%) gap, with Patna the more polluted and Katihar the cleaner of the two. On 974 days when both cities reported, Katihar was cleaner on 808 of them; the average daily gap was 83 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Patna 30 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Patna spans 6 stations with a 39-point spread (min 154, max 193).
Verdict
🏆 Patna has better air quality with an AQI of 227 compared to Katihar's 253.