Kollam vs Nalbāri
Side-by-side air quality comparison between Kollam and Nalbāri.
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 | Nalbāri |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 54.50 |
| PM10(µg/m³) | 7.90 | 61.20 |
| NO₂(µg/m³) | 3.80 | 6.50 |
| SO₂(µg/m³) | 1.60 | 5.80 |
| O₃(µg/m³) | 33.00 | 123.00 |
| CO(µg/m³) | 96.00 | 407.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Nalbāri averaged 129 — a 45-point (54%) gap, with Nalbāri the more polluted and Kollam the cleaner of the two. On 541 days when both cities reported, Kollam was cleaner on 399 of them; the average daily gap was 78 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; Nalbāri was 0% Severe and 41% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Nalbāri 18 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Nalbāri has improved by 72 AQI points (35.8%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Nalbāri hit AQI 384 at Bata Chowk (PCBA) on 2024-01-08.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Nalbāri spans 1 stations with a 0-point spread (min 141, max 141).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Nalbāri's 91. That's a significant difference of 82 points.