Ariyalur vs Purnia
Side-by-side air quality comparison between Ariyalur 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ariyalur averaged an AQI of 46 while Purnia averaged 133 — a 87-point (189%) gap, with Purnia the more polluted and Ariyalur the cleaner of the two. On 455 days when both cities reported, Ariyalur was cleaner on 437 of them; the average daily gap was 118 AQI points.
Seasonality & days
Ariyalur peaks in March, while Purnia peaks in January. Ariyalur logged 0% Severe days and 93.8% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Ariyalur 57 days, Purnia 14 days.
Year-over-year progress
Ariyalur has improved by 35 AQI points (43.2%) from 2022 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Ariyalur reached AQI 221 at Keelapalur (TNPCB) on 2024-04-07; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Ariyalur spans 1 CPCB stations with a 0-point spread (min 51, max 51); Purnia spans 1 stations with a 0-point spread (min 176, max 176).