Katihar vs Kolār
Side-by-side air quality comparison between Katihar and Kolār.
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 | Kolār |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 5.90 |
| PM10(µg/m³) | 114.30 | 7.20 |
| NO₂(µg/m³) | 31.10 | 10.90 |
| SO₂(µg/m³) | 18.30 | 4.70 |
| O₃(µg/m³) | 43.00 | 35.00 |
| CO(µg/m³) | 770.00 | 189.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Kolār averaged 65 — a 58-point (89%) gap, with Katihar the more polluted and Kolār the cleaner of the two. On 474 days when both cities reported, Kolār was cleaner on 425 of them; the average daily gap was 123 AQI points.
Seasonality & days
Katihar peaks in December, while Kolār peaks in September. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Kolār was 0.9% Severe and 85.30000000000001% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Kolār 17 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Kolār has improved by 56 AQI points (46.3%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Kolār hit AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Kolār spans 1 stations with a 0-point spread (min 71, max 71).
Verdict
🏆 Kolār has better air quality with an AQI of 10 compared to Katihar's 264. That's a significant difference of 254 points.