Coimbatore vs Ujjain
Side-by-side air quality comparison between Coimbatore and Ujjain.
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 | Coimbatore | Ujjain |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 32.40 |
| PM10(µg/m³) | 3.00 | 47.70 |
| NO₂(µg/m³) | 4.60 | 6.80 |
| SO₂(µg/m³) | 2.00 | 13.70 |
| O₃(µg/m³) | 40.00 | 66.00 |
| CO(µg/m³) | 163.00 | 215.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Ujjain averaged 116 — a 50-point (76%) gap, with Ujjain the more polluted and Coimbatore the cleaner of the two. On 955 days when both cities reported, Coimbatore was cleaner on 828 of them; the average daily gap was 61 AQI points.
Seasonality & days
Both cities see their worst air in November on average. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Ujjain was 0.1% Severe and 33.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Ujjain 67 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Ujjain has improved by 71 AQI points (38%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Ujjain hit AQI 500 at Mahakaleshwar Temple (MPPCB) on 2023-03-10.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Ujjain spans 1 stations with a 0-point spread (min 131, max 131).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Ujjain's 55. That's a significant difference of 51 points.