Nalbāri vs Siwan
Side-by-side air quality comparison between Nalbāri 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 | Nalbāri | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 45.10 | 44.90 |
| PM10(µg/m³) | 52.50 | 69.80 |
| NO₂(µg/m³) | 1.20 | 0.60 |
| SO₂(µg/m³) | 7.80 | 6.90 |
| O₃(µg/m³) | 170.00 | 187.00 |
| CO(µg/m³) | 378.00 | 225.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nalbāri averaged an AQI of 129 while Siwan averaged 148 — a 19-point (15%) gap, with Siwan the more polluted and Nalbāri the cleaner of the two. On 497 days when both cities reported, Nalbāri was cleaner on 333 of them; the average daily gap was 84 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Nalbāri logged 0% Severe days and 41% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Nalbāri 18 days, Siwan 13 days.
Year-over-year progress
Nalbāri has improved by 72 AQI points (35.8%) from 2022 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Nalbāri reached AQI 384 at Bata Chowk (PCBA) on 2024-01-08; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Nalbāri spans 1 CPCB stations with a 0-point spread (min 141, max 141); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Siwan has better air quality with an AQI of 75 compared to Nalbāri's 76.