Siwan vs Tirupati
Side-by-side air quality comparison between Siwan 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 | Siwan | Tirupati |
|---|---|---|
| PM2.5(µg/m³) | 44.90 | 5.10 |
| PM10(µg/m³) | 69.80 | 7.60 |
| NO₂(µg/m³) | 0.60 | 0.90 |
| SO₂(µg/m³) | 6.90 | 1.00 |
| O₃(µg/m³) | 187.00 | 96.00 |
| CO(µg/m³) | 225.00 | 130.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siwan averaged an AQI of 148 while Tirupati averaged 75 — a 73-point (97%) gap, with Siwan the more polluted and Tirupati the cleaner of the two. On 380 days when both cities reported, Tirupati was cleaner on 344 of them; the average daily gap was 130 AQI points.
Seasonality & days
Siwan peaks in January, while Tirupati peaks in April. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Tirupati was 0% Severe and 84% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Tirupati 36 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Tirupati has improved by 20 AQI points (21.1%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Tirupati hit AQI 263 at Vaikuntapuram (APPCB) on 2022-11-16.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Tirupati spans 1 stations with a 0-point spread (min 75, max 75).
Verdict
🏆 Tirupati has better air quality with an AQI of 9 compared to Siwan's 75. That's a significant difference of 66 points.