Nārnaul vs Purnia
Side-by-side air quality comparison between Nārnaul 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 | Nārnaul | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 45.40 | 105.90 |
| PM10(µg/m³) | 126.20 | 109.00 |
| NO₂(µg/m³) | 12.40 | 25.20 |
| SO₂(µg/m³) | 7.70 | 20.10 |
| O₃(µg/m³) | 86.00 | 67.00 |
| CO(µg/m³) | 365.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nārnaul averaged an AQI of 94 while Purnia averaged 133 — a 39-point (41%) gap, with Purnia the more polluted and Nārnaul the cleaner of the two. On 771 days when both cities reported, Nārnaul was cleaner on 554 of them; the average daily gap was 82 AQI points.
Seasonality & days
Nārnaul peaks in November, while Purnia peaks in January. Nārnaul logged 0.1% Severe days and 40.8% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Nārnaul 63 days, Purnia 14 days.
Year-over-year progress
Nārnaul has improved by 37 AQI points (28.2%) from 2019 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Nārnaul reached AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Nārnaul spans 1 CPCB stations with a 0-point spread (min 130, max 130); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Nārnaul has better air quality with an AQI of 118 compared to Purnia's 253. That's a significant difference of 135 points.