Noida vs Purnia
Side-by-side air quality comparison between Noida 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 | Noida | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 69.60 | 105.90 |
| PM10(µg/m³) | 137.40 | 109.00 |
| NO₂(µg/m³) | 30.10 | 25.20 |
| SO₂(µg/m³) | 17.90 | 20.10 |
| O₃(µg/m³) | 65.00 | 67.00 |
| CO(µg/m³) | 562.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Noida averaged an AQI of 182 while Purnia averaged 133 — a 49-point (37%) gap, with Noida the more polluted and Purnia the cleaner of the two. On 603 days when both cities reported, Purnia was cleaner on 455 of them; the average daily gap was 92 AQI points.
Seasonality & days
Noida peaks in November, while Purnia peaks in January. Noida logged 8.9% Severe days and 16.5% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Noida 14 days, Purnia 14 days.
Year-over-year progress
Noida has improved by 79 AQI points (30.3%) from 2017 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Noida reached AQI 500 at Sector-1 (UPPCB) on 2019-11-01; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Noida spans 4 CPCB stations with a 15-point spread (min 195, max 210); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Noida has better air quality with an AQI of 133 compared to Purnia's 253. That's a significant difference of 120 points.