Kolār vs Ratlam
Side-by-side air quality comparison between Kolār and Ratlam.
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 | Kolār | Ratlam |
|---|---|---|
| PM2.5(µg/m³) | 5.90 | 31.00 |
| PM10(µg/m³) | 7.20 | 47.60 |
| NO₂(µg/m³) | 10.90 | 8.60 |
| SO₂(µg/m³) | 4.70 | 15.80 |
| O₃(µg/m³) | 35.00 | 55.00 |
| CO(µg/m³) | 189.00 | 205.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolār averaged an AQI of 65 while Ratlam averaged 113 — a 48-point (74%) gap, with Ratlam the more polluted and Kolār the cleaner of the two. On 985 days when both cities reported, Kolār was cleaner on 755 of them; the average daily gap was 53 AQI points.
Seasonality & days
Kolār peaks in September, while Ratlam peaks in November. Kolār logged 0.9% Severe days and 85.30000000000001% Good-or-Satisfactory days; Ratlam was 0% Severe and 46.4% Good-or-Satisfactory. Longest clean-air streaks: Kolār 17 days, Ratlam 59 days.
Year-over-year progress
Kolār has improved by 56 AQI points (46.3%) from 2018 to 2024; Ratlam has improved by 19 AQI points (14.4%) over the same window. The worst recorded day for Kolār reached AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18; Ratlam hit AQI 302 at Shasthri Nagar Ratlam (Lab) on 2020-11-11.
Station-level disparity
Kolār spans 1 CPCB stations with a 0-point spread (min 71, max 71); Ratlam spans 1 stations with a 0-point spread (min 103, max 103).
Verdict
🏆 Kolār has better air quality with an AQI of 10 compared to Ratlam's 53.