Purnia vs Tumkur
Side-by-side air quality comparison between Purnia and Tumkur.
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 | Purnia | Tumkur |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 3.40 |
| PM10(µg/m³) | 109.00 | 4.50 |
| NO₂(µg/m³) | 25.20 | 6.40 |
| SO₂(µg/m³) | 20.10 | 1.30 |
| O₃(µg/m³) | 67.00 | 35.00 |
| CO(µg/m³) | 707.00 | 124.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Tumkur averaged 88 — a 45-point (51%) gap, with Purnia the more polluted and Tumkur the cleaner of the two. On 403 days when both cities reported, Tumkur was cleaner on 278 of them; the average daily gap was 81 AQI points.
Seasonality & days
Purnia peaks in January, while Tumkur peaks in December. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Tumkur was 0% Severe and 54% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Tumkur 20 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Tumkur has improved by 69 AQI points (43.9%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Tumkur hit AQI 355 at Thimmalapura (KSPCB) on 2023-02-15.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Tumkur spans 1 stations with a 0-point spread (min 97, max 97).
Verdict
🏆 Tumkur has better air quality with an AQI of 6 compared to Purnia's 253. That's a significant difference of 247 points.