Coimbatore vs Puducherry
Side-by-side air quality comparison between Coimbatore and Puducherry.
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, Coimbatore averaged an AQI of 66 while Puducherry averaged 55 — a 11-point (20%) gap, with Coimbatore the more polluted and Puducherry the cleaner of the two. On 596 days when both cities reported, Puducherry was cleaner on 374 of them; the average daily gap was 25 AQI points.
Seasonality & days
Coimbatore peaks in November, while Puducherry peaks in December. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Puducherry was 0% Severe and 95.4% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Puducherry 117 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Puducherry has worsened by 1 AQI points (1.9%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Puducherry hit AQI 274 at Jawahar Nagar (PPCC) on 2022-10-25.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Puducherry spans 1 stations with a 0-point spread (min 56, max 56).