Hisar vs Thiruvananthapuram
Side-by-side air quality comparison between Hisar and Thiruvananthapuram.
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 | Hisar | Thiruvananthapuram |
|---|---|---|
| PM2.5(µg/m³) | 76.60 | 5.20 |
| PM10(µg/m³) | 237.00 | 9.60 |
| NO₂(µg/m³) | 40.60 | 1.50 |
| SO₂(µg/m³) | 7.30 | 0.40 |
| O₃(µg/m³) | 27.00 | 38.00 |
| CO(µg/m³) | 573.00 | 91.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hisar averaged an AQI of 136 while Thiruvananthapuram averaged 56 — a 80-point (143%) gap, with Hisar the more polluted and Thiruvananthapuram the cleaner of the two. On 1639 days when both cities reported, Thiruvananthapuram was cleaner on 1498 of them; the average daily gap was 107 AQI points.
Seasonality & days
Hisar peaks in November, while Thiruvananthapuram peaks in January. Hisar logged 1.6% Severe days and 29.700000000000003% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Hisar 34 days, Thiruvananthapuram 172 days.
Year-over-year progress
Hisar has improved by 39 AQI points (22.3%) from 2019 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Hisar reached AQI 490 at Urban Estate-II (HSPCB) on 2019-11-02; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Hisar spans 1 CPCB stations with a 0-point spread (min 168, max 168); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).
Verdict
🏆 Thiruvananthapuram has better air quality with an AQI of 10 compared to Hisar's 191. That's a significant difference of 181 points.