Purnia vs Ratlam
Side-by-side air quality comparison between Purnia 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 | Purnia | Ratlam |
|---|---|---|
| PM2.5(µg/m³) | 88.20 | 27.40 |
| PM10(µg/m³) | 98.70 | 51.60 |
| NO₂(µg/m³) | 2.30 | 0.60 |
| SO₂(µg/m³) | 24.60 | 6.00 |
| O₃(µg/m³) | 239.00 | 106.00 |
| CO(µg/m³) | 359.00 | 139.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Ratlam averaged 113 — a 20-point (18%) gap, with Purnia the more polluted and Ratlam the cleaner of the two. On 827 days when both cities reported, Ratlam was cleaner on 631 of them; the average daily gap was 90 AQI points.
Seasonality & days
Purnia peaks in January, while Ratlam peaks in November. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Ratlam was 0% Severe and 46.4% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Ratlam 59 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Ratlam has improved by 19 AQI points (14.4%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Ratlam hit AQI 302 at Shasthri Nagar Ratlam (Lab) on 2020-11-11.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); 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 Purnia's 194. That's a significant difference of 141 points.