Katihar vs Noida
Side-by-side air quality comparison between Katihar and Noida.
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 | Noida |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 69.60 |
| PM10(µg/m³) | 109.00 | 137.40 |
| NO₂(µg/m³) | 25.20 | 30.10 |
| SO₂(µg/m³) | 20.10 | 17.90 |
| O₃(µg/m³) | 67.00 | 65.00 |
| CO(µg/m³) | 727.00 | 562.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Noida averaged 182 — a 59-point (48%) gap, with Noida the more polluted and Katihar the cleaner of the two. On 638 days when both cities reported, Katihar was cleaner on 458 of them; the average daily gap was 91 AQI points.
Seasonality & days
Katihar peaks in December, while Noida peaks in November. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Noida was 8.9% Severe and 16.5% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Noida 14 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Noida has improved by 79 AQI points (30.3%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Noida hit AQI 500 at Sector-1 (UPPCB) on 2019-11-01.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Noida spans 4 stations with a 15-point spread (min 195, max 210).
Verdict
🏆 Noida has better air quality with an AQI of 133 compared to Katihar's 253. That's a significant difference of 120 points.