Ajmer vs Howrah
Side-by-side air quality comparison between Ajmer and Howrah.
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 | Ajmer | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 19.40 | 68.70 |
| PM10(µg/m³) | 41.90 | 72.60 |
| NO₂(µg/m³) | 4.60 | 22.20 |
| SO₂(µg/m³) | 4.30 | 11.50 |
| O₃(µg/m³) | 57.00 | 55.00 |
| CO(µg/m³) | 155.00 | 360.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2022, Ajmer averaged an AQI of 112 while Howrah averaged 126 — a 14-point (13%) gap, with Howrah the more polluted and Ajmer the cleaner of the two. On 1700 days when both cities reported, Ajmer was cleaner on 984 of them; the average daily gap was 87 AQI points.
Seasonality & days
Ajmer peaks in November, while Howrah peaks in December. Ajmer logged 0% Severe days and 54.300000000000004% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Ajmer 94 days, Howrah 120 days.
Year-over-year progress
Ajmer has improved by 22 AQI points (16.4%) from 2017 to 2022; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Ajmer reached AQI 357 at Civil Lines (RSPCB) on 2021-03-31; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Ajmer spans 1 CPCB stations with a 0-point spread (min 102, max 102); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Ajmer has better air quality with an AQI of 42 compared to Howrah's 130. That's a significant difference of 88 points.