Purnia vs Tonk
Side-by-side air quality comparison between Purnia and Tonk.
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 | Tonk |
|---|---|---|
| PM2.5(µg/m³) | 112.00 | 34.90 |
| PM10(µg/m³) | 115.70 | 75.90 |
| NO₂(µg/m³) | 31.10 | 14.10 |
| SO₂(µg/m³) | 18.40 | 4.50 |
| O₃(µg/m³) | 42.00 | 38.00 |
| CO(µg/m³) | 756.00 | 239.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Tonk averaged 142 — a 9-point (7%) gap, with Tonk the more polluted and Purnia the cleaner of the two. On 443 days when both cities reported, Purnia was cleaner on 233 of them; the average daily gap was 53 AQI points.
Seasonality & days
Purnia peaks in January, while Tonk peaks in November. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Tonk was 0% Severe and 28.200000000000003% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Tonk 11 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Tonk has improved by 14 AQI points (9%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Tonk hit AQI 368 at Shastri Nagar (RSPCB) on 2023-11-17.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Tonk spans 1 stations with a 0-point spread (min 148, max 148).
Verdict
🏆 Tonk has better air quality with an AQI of 76 compared to Purnia's 274. That's a significant difference of 198 points.