Puducherry vs Purnia
Side-by-side air quality comparison between Puducherry 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 | Puducherry | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 12.20 | 112.00 |
| PM10(µg/m³) | 14.50 | 115.70 |
| NO₂(µg/m³) | 18.70 | 31.10 |
| SO₂(µg/m³) | 9.00 | 18.40 |
| O₃(µg/m³) | 33.00 | 42.00 |
| CO(µg/m³) | 402.00 | 756.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Puducherry averaged an AQI of 55 while Purnia averaged 133 — a 78-point (142%) gap, with Purnia the more polluted and Puducherry the cleaner of the two. On 849 days when both cities reported, Puducherry was cleaner on 807 of them; the average daily gap was 121 AQI points.
Seasonality & days
Puducherry peaks in December, while Purnia peaks in January. Puducherry logged 0% Severe days and 95.4% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Puducherry 117 days, Purnia 14 days.
Year-over-year progress
Puducherry has worsened by 1 AQI points (1.9%) from 2021 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Puducherry reached AQI 274 at Jawahar Nagar (PPCC) on 2022-10-25; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Puducherry spans 1 CPCB stations with a 0-point spread (min 56, max 56); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Puducherry has better air quality with an AQI of 20 compared to Purnia's 274. That's a significant difference of 254 points.