Bilaspur vs Purnia
Side-by-side air quality comparison between Bilaspur 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 | Bilaspur | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 38.80 | 112.00 |
| PM10(µg/m³) | 47.40 | 115.70 |
| NO₂(µg/m³) | 22.60 | 31.10 |
| SO₂(µg/m³) | 15.90 | 18.40 |
| O₃(µg/m³) | 56.00 | 42.00 |
| CO(µg/m³) | 481.00 | 756.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bilaspur averaged an AQI of 61 while Purnia averaged 133 — a 72-point (118%) gap, with Purnia the more polluted and Bilaspur the cleaner of the two. On 729 days when both cities reported, Bilaspur was cleaner on 662 of them; the average daily gap was 102 AQI points.
Seasonality & days
Bilaspur peaks in December, while Purnia peaks in January. Bilaspur logged 0% Severe days and 88% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Bilaspur 66 days, Purnia 14 days.
Year-over-year progress
Bilaspur has improved by 22 AQI points (26.5%) from 2021 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Bilaspur reached AQI 259 at Mangala (NTPC) on 2023-03-09; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Bilaspur spans 1 CPCB stations with a 0-point spread (min 69, max 69); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Bilaspur has better air quality with an AQI of 65 compared to Purnia's 274. That's a significant difference of 209 points.