Arrah vs Ooty
Side-by-side air quality comparison between Arrah 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 | Arrah | Ooty |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 4.40 |
| PM10(µg/m³) | 115.50 | 5.20 |
| NO₂(µg/m³) | 53.70 | 7.00 |
| SO₂(µg/m³) | 13.70 | 0.90 |
| O₃(µg/m³) | 10.00 | 31.00 |
| CO(µg/m³) | 944.00 | 124.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Ooty averaged 58 — a 65-point (112%) gap, with Arrah the more polluted and Ooty the cleaner of the two. On 472 days when both cities reported, Ooty was cleaner on 443 of them; the average daily gap was 110 AQI points.
Seasonality & days
Arrah peaks in January, while Ooty peaks in May. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Ooty was 0% Severe and 94.2% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Ooty 22 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Ooty is essentially flat over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Ooty hit AQI 164 at Bombay Castel (TNPCB) on 2024-12-17.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); 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 Arrah's 231. That's a significant difference of 224 points.