Mangalore vs Siwan
Side-by-side air quality comparison between Mangalore and Siwan.
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 | Mangalore | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 7.50 | 108.00 |
| PM10(µg/m³) | 13.10 | 122.50 |
| NO₂(µg/m³) | 5.40 | 59.80 |
| SO₂(µg/m³) | 1.80 | 14.10 |
| O₃(µg/m³) | 43.00 | 4.00 |
| CO(µg/m³) | 169.00 | 856.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Mangalore averaged an AQI of 61 while Siwan averaged 148 — a 87-point (143%) gap, with Siwan the more polluted and Mangalore the cleaner of the two. On 737 days when both cities reported, Mangalore was cleaner on 697 of them; the average daily gap was 129 AQI points.
Seasonality & days
Mangalore peaks in February, while Siwan peaks in January. Mangalore logged 0% Severe days and 87.2% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Mangalore 64 days, Siwan 13 days.
Year-over-year progress
Mangalore has improved by 9 AQI points (12.9%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Mangalore reached AQI 235 at Kadri (KSPCB) on 2023-11-17; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Mangalore spans 1 CPCB stations with a 0-point spread (min 68, max 68); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Mangalore has better air quality with an AQI of 13 compared to Siwan's 260. That's a significant difference of 247 points.