Katihar vs Ooty
Side-by-side air quality comparison between Katihar and Ooty.
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 | Ooty |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 4.40 |
| PM10(µg/m³) | 114.30 | 5.20 |
| NO₂(µg/m³) | 31.10 | 7.00 |
| SO₂(µg/m³) | 18.30 | 0.90 |
| O₃(µg/m³) | 43.00 | 31.00 |
| CO(µg/m³) | 770.00 | 124.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Ooty averaged 58 — a 65-point (112%) gap, with Katihar the more polluted and Ooty the cleaner of the two. On 540 days when both cities reported, Ooty was cleaner on 495 of them; the average daily gap was 131 AQI points.
Seasonality & days
Katihar peaks in December, while Ooty peaks in May. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Ooty was 0% Severe and 94.2% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Ooty 22 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Ooty is essentially flat over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Ooty hit AQI 164 at Bombay Castel (TNPCB) on 2024-12-17.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Ooty spans 1 stations with a 0-point spread (min 59, max 59).
Verdict
🏆 Ooty has better air quality with an AQI of 7 compared to Katihar's 264. That's a significant difference of 257 points.