Coimbatore vs Shillong
Side-by-side air quality comparison between Coimbatore and Shillong.
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 Shillong averaged 75 — a 9-point (14%) gap, with Shillong the more polluted and Coimbatore the cleaner of the two. On 632 days when both cities reported, Shillong was cleaner on 450 of them; the average daily gap was 35 AQI points.
Seasonality & days
Coimbatore peaks in November, while Shillong peaks in February. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Shillong 113 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Shillong spans 2 stations with a 2-point spread (min 42, max 44).