Thiruvananthapuram vs Ulhasnagar
Side-by-side air quality comparison between Thiruvananthapuram 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 | Thiruvananthapuram | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 22.10 |
| PM10(µg/m³) | 10.00 | 40.40 |
| NO₂(µg/m³) | 1.70 | 23.10 |
| SO₂(µg/m³) | 0.50 | 21.70 |
| O₃(µg/m³) | 37.00 | 19.00 |
| CO(µg/m³) | 85.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Thiruvananthapuram averaged an AQI of 56 while Ulhasnagar averaged 117 — a 61-point (109%) gap, with Ulhasnagar the more polluted and Thiruvananthapuram the cleaner of the two. On 352 days when both cities reported, Thiruvananthapuram was cleaner on 301 of them; the average daily gap was 50 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Thiruvananthapuram logged 0% Severe days and 92% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Thiruvananthapuram 172 days, Ulhasnagar 74 days.
Year-over-year progress
Thiruvananthapuram has improved by 11 AQI points (16.4%) from 2017 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Thiruvananthapuram reached AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Thiruvananthapuram spans 2 CPCB stations with a 7-point spread (min 57, max 64); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Thiruvananthapuram has better air quality with an AQI of 10 compared to Ulhasnagar's 40.