Purnia vs Tirupati
Side-by-side air quality comparison between Purnia and Tirupati.
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 | Tirupati |
|---|---|---|
| PM2.5(µg/m³) | 90.60 | 7.00 |
| PM10(µg/m³) | 95.00 | 9.40 |
| NO₂(µg/m³) | 9.40 | 4.30 |
| SO₂(µg/m³) | 24.60 | 2.20 |
| O₃(µg/m³) | 144.00 | 74.00 |
| CO(µg/m³) | 573.00 | 156.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Tirupati averaged 75 — a 58-point (77%) gap, with Purnia the more polluted and Tirupati the cleaner of the two. On 392 days when both cities reported, Tirupati was cleaner on 330 of them; the average daily gap was 129 AQI points.
Seasonality & days
Purnia peaks in January, while Tirupati peaks in April. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Tirupati was 0% Severe and 84% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Tirupati 36 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Tirupati has improved by 20 AQI points (21.1%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Tirupati hit AQI 263 at Vaikuntapuram (APPCB) on 2022-11-16.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Tirupati spans 1 stations with a 0-point spread (min 75, max 75).
Verdict
🏆 Tirupati has better air quality with an AQI of 12 compared to Purnia's 203. That's a significant difference of 191 points.