Ambala vs Purnia
Side-by-side air quality comparison between Ambala 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, Ambala averaged an AQI of 94 while Purnia averaged 133 — a 39-point (41%) gap, with Purnia the more polluted and Ambala the cleaner of the two. On 791 days when both cities reported, Ambala was cleaner on 547 of them; the average daily gap was 83 AQI points.
Seasonality & days
Ambala peaks in November, while Purnia peaks in January. Ambala logged 0.2% Severe days and 46.5% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Ambala 44 days, Purnia 14 days.
Year-over-year progress
Ambala has improved by 52 AQI points (35.6%) from 2019 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Ambala reached AQI 452 at Patti Mehar (HSPCB) on 2020-11-04; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Ambala spans 1 CPCB stations with a 0-point spread (min 126, max 126); Purnia spans 1 stations with a 0-point spread (min 176, max 176).