Karnal vs Purnia
Side-by-side air quality comparison between Karnal 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 | Karnal | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 130.90 | 105.90 |
| PM10(µg/m³) | 553.20 | 109.00 |
| NO₂(µg/m³) | 43.30 | 25.20 |
| SO₂(µg/m³) | 17.00 | 20.10 |
| O₃(µg/m³) | 43.00 | 67.00 |
| CO(µg/m³) | 906.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Karnal averaged an AQI of 102 while Purnia averaged 133 — a 31-point (30%) gap, with Purnia the more polluted and Karnal the cleaner of the two. On 829 days when both cities reported, Karnal was cleaner on 623 of them; the average daily gap was 81 AQI points.
Seasonality & days
Karnal peaks in November, while Purnia peaks in January. Karnal logged 0.1% Severe days and 46.2% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Karnal 53 days, Purnia 14 days.
Year-over-year progress
Karnal has improved by 71 AQI points (41%) from 2019 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Karnal reached AQI 456 at Sector-12 (HSPCB) on 2019-11-03; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Karnal spans 1 CPCB stations with a 0-point spread (min 128, max 128); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Purnia has better air quality with an AQI of 253 compared to Karnal's 473. That's a significant difference of 220 points.