Katihar vs Ratlam
Side-by-side air quality comparison between Katihar and Ratlam.
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 | Ratlam |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 31.00 |
| PM10(µg/m³) | 114.30 | 47.60 |
| NO₂(µg/m³) | 31.10 | 8.60 |
| SO₂(µg/m³) | 18.30 | 15.80 |
| O₃(µg/m³) | 43.00 | 55.00 |
| CO(µg/m³) | 770.00 | 205.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Ratlam averaged 113 — a 10-point (9%) gap, with Katihar the more polluted and Ratlam the cleaner of the two. On 908 days when both cities reported, Ratlam was cleaner on 696 of them; the average daily gap was 97 AQI points.
Seasonality & days
Katihar peaks in December, while Ratlam peaks in November. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Ratlam was 0% Severe and 46.4% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Ratlam 59 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Ratlam has improved by 19 AQI points (14.4%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Ratlam hit AQI 302 at Shasthri Nagar Ratlam (Lab) on 2020-11-11.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Ratlam spans 1 stations with a 0-point spread (min 103, max 103).
Verdict
🏆 Ratlam has better air quality with an AQI of 53 compared to Katihar's 264. That's a significant difference of 211 points.