Alwar vs Purnia
Side-by-side air quality comparison between Alwar and Purnia.
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 | Alwar | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 58.70 | 105.90 |
| PM10(µg/m³) | 158.30 | 109.00 |
| NO₂(µg/m³) | 14.30 | 25.20 |
| SO₂(µg/m³) | 8.50 | 20.10 |
| O₃(µg/m³) | 76.00 | 67.00 |
| CO(µg/m³) | 357.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Alwar averaged an AQI of 88 while Purnia averaged 133 — a 45-point (51%) gap, with Purnia the more polluted and Alwar the cleaner of the two. On 874 days when both cities reported, Alwar was cleaner on 701 of them; the average daily gap was 92 AQI points.
Seasonality & days
Alwar peaks in November, while Purnia peaks in January. Alwar logged 0% Severe days and 70.2% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Alwar 97 days, Purnia 14 days.
Year-over-year progress
Alwar has improved by 125 AQI points (58.7%) from 2017 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Alwar reached AQI 356 at Moti Doongri (RSPCB) on 2017-11-11; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Alwar spans 1 CPCB stations with a 0-point spread (min 95, max 95); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Alwar has better air quality with an AQI of 139 compared to Purnia's 253. That's a significant difference of 114 points.