Katihar vs Nārnaul
Side-by-side air quality comparison between Katihar and Nārnaul.
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 | Nārnaul |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 45.40 |
| PM10(µg/m³) | 109.00 | 126.20 |
| NO₂(µg/m³) | 25.20 | 12.40 |
| SO₂(µg/m³) | 20.10 | 7.70 |
| O₃(µg/m³) | 67.00 | 86.00 |
| CO(µg/m³) | 727.00 | 365.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Nārnaul averaged 94 — a 29-point (31%) gap, with Katihar the more polluted and Nārnaul the cleaner of the two. On 851 days when both cities reported, Nārnaul was cleaner on 651 of them; the average daily gap was 89 AQI points.
Seasonality & days
Katihar peaks in December, while Nārnaul peaks in November. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Nārnaul was 0.1% Severe and 40.8% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Nārnaul 63 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Nārnaul has improved by 37 AQI points (28.2%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Nārnaul hit AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Nārnaul spans 1 stations with a 0-point spread (min 130, max 130).
Verdict
🏆 Nārnaul has better air quality with an AQI of 118 compared to Katihar's 253. That's a significant difference of 135 points.