Coimbatore vs Ulhasnagar
Side-by-side air quality comparison between Coimbatore and Ulhasnagar.
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 | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 22.10 |
| PM10(µg/m³) | 3.00 | 40.40 |
| NO₂(µg/m³) | 4.60 | 23.10 |
| SO₂(µg/m³) | 2.00 | 21.70 |
| O₃(µg/m³) | 40.00 | 19.00 |
| CO(µg/m³) | 163.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Ulhasnagar averaged 117 — a 51-point (77%) gap, with Ulhasnagar the more polluted and Coimbatore the cleaner of the two. On 283 days when both cities reported, Coimbatore was cleaner on 241 of them; the average daily gap was 57 AQI points.
Seasonality & days
Coimbatore peaks in November, while Ulhasnagar peaks in January. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Ulhasnagar 74 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Ulhasnagar's 40.