Katihar vs Tālcher
Side-by-side air quality comparison between Katihar and Tālcher.
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 | Tālcher |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 65.90 |
| PM10(µg/m³) | 114.30 | 72.20 |
| NO₂(µg/m³) | 31.10 | 25.60 |
| SO₂(µg/m³) | 18.30 | 5.80 |
| O₃(µg/m³) | 43.00 | 19.00 |
| CO(µg/m³) | 770.00 | 508.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Tālcher averaged 127 — a 4-point (3%) gap, with Tālcher the more polluted and Katihar the cleaner of the two. On 551 days when both cities reported, Tālcher was cleaner on 501 of them; the average daily gap was 110 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Tālcher was 0.2% Severe and 43.1% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Tālcher 44 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Tālcher has improved by 63 AQI points (33.2%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Tālcher hit AQI 414 at Talcher (OSPCB) on 2018-11-27.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Tālcher spans 1 stations with a 0-point spread (min 132, max 132).
Verdict
🏆 Tālcher has better air quality with an AQI of 120 compared to Katihar's 264. That's a significant difference of 144 points.