Kollam vs Visakhapatnam
Side-by-side air quality comparison between Kollam and Visakhapatnam.
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 | Kollam | Visakhapatnam |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 33.60 |
| PM10(µg/m³) | 7.90 | 38.90 |
| NO₂(µg/m³) | 3.80 | 23.30 |
| SO₂(µg/m³) | 1.60 | 49.40 |
| O₃(µg/m³) | 33.00 | 95.00 |
| CO(µg/m³) | 96.00 | 516.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Visakhapatnam averaged 110 — a 26-point (31%) gap, with Visakhapatnam the more polluted and Kollam the cleaner of the two. On 1315 days when both cities reported, Kollam was cleaner on 894 of them; the average daily gap was 44 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Visakhapatnam was 0% Severe and 50.1% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Visakhapatnam 27 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Visakhapatnam has worsened by 15 AQI points (15.8%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Visakhapatnam hit AQI 341 at GVM Corporation (APPCB) on 2019-01-14.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Visakhapatnam spans 1 stations with a 0-point spread (min 111, max 111).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Visakhapatnam's 57.