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Ariyalur vs Sasaram

Side-by-side air quality comparison between Ariyalur and Sasaram.

Cleaner right now: Ariyalur (122-pt gap)Historical head-to-head: Ariyalur cleaner 416/486 daysYoY 20222024: Ariyalur -43.2% · Sasaram -60.4%

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

🏆 Cleaner

Ariyalur

Tamil Nadu, India

Good

PM2.5: 6.8 µg/m³

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VS

Sasaram

Bihar, India

Moderate

PM2.5: 69.8 µg/m³

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Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)
PollutantAriyalurSasaram
PM2.5(µg/m³)6.8069.80
PM10(µg/m³)8.3080.30
NO₂(µg/m³)7.5015.10
SO₂(µg/m³)6.5014.40
O₃(µg/m³)43.00101.00
CO(µg/m³)133.00627.00

CPCB Multi-Year History (2016–2024)

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Summary

Overview

In 2024, Ariyalur averaged an AQI of 46 while Sasaram averaged 109 — a 63-point (137%) gap, with Sasaram the more polluted and Ariyalur the cleaner of the two. On 486 days when both cities reported, Ariyalur was cleaner on 416 of them; the average daily gap was 80 AQI points.

Seasonality & days

Ariyalur peaks in March, while Sasaram peaks in January. Ariyalur logged 0% Severe days and 93.8% Good-or-Satisfactory days; Sasaram was 0.1% Severe and 37% Good-or-Satisfactory. Longest clean-air streaks: Ariyalur 57 days, Sasaram 27 days.

Year-over-year progress

Ariyalur has improved by 35 AQI points (43.2%) from 2022 to 2024; Sasaram has improved by 166 AQI points (60.4%) over the same window. The worst recorded day for Ariyalur reached AQI 221 at Keelapalur (TNPCB) on 2024-04-07; Sasaram hit AQI 401 at Dada Peer (BSPCB) on 2021-11-28.

Station-level disparity

Ariyalur spans 1 CPCB stations with a 0-point spread (min 51, max 51); Sasaram spans 1 stations with a 0-point spread (min 148, max 148).

Verdict

🏆 Ariyalur has better air quality with an AQI of 11 compared to Sasaram's 133. That's a significant difference of 122 points.

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