Kichha, nestled in the foothills of the Himalayas within Uttarakhand, India, occupies a geographically significant position. Located at 28.9200°N, 79.5000°E, the city’s terrain is largely flat, part of the broader Terai arc, a fertile alluvial plain. This plain is formed by sediment deposited by rivers originating in the Himalayas, notably the Sharda River which flows nearby. Kichha’s elevation is relatively low, around 230 meters, contributing to warmer temperatures and potential for temperature inversions. The surrounding landscape is a mix of agricultural land – sugarcane and rice are prominent crops – and patches of sal forests, typical of the Terai region. The urban-rural gradient is quite sharp; Kichha serves as a market town for surrounding villages. Its proximity to the industrial belt of Rudrapur (approximately 20km) introduces a significant source of potential pollutants. The Terai’s unique geography, while fertile, also limits air dispersion due to the surrounding hills and frequent atmospheric stability. This combination of factors makes Kichha particularly vulnerable to air quality issues, especially during periods of low wind speed and temperature inversions, trapping pollutants close to the ground. The city’s growth, driven by agriculture and industry, further exacerbates these challenges.

Kichha experiences a distinct seasonal air quality pattern. The winter months (November to February) are typically the most polluted. Cool temperatures lead to temperature inversions, trapping pollutants from residential heating (wood and biomass burning) and industrial emissions. Low wind speeds further hinder dispersion. Fog is also common, exacerbating particulate matter concentrations. March and April bring some improvement as temperatures rise and winds pick up, but dust from agricultural activities can become a concern. The monsoon season (July to September) generally offers the cleanest air. Heavy rainfall effectively washes away pollutants, and increased humidity promotes settling of particulate matter. However, increased cloud cover can also contribute to localised temperature inversions. October and November see a gradual deterioration as the monsoon retreats, temperatures drop, and agricultural burning increases in preparation for the next planting season. For sensitive groups – children, the elderly, and those with respiratory conditions – avoiding outdoor activity during winter mornings and evenings is advisable. During the monsoon, while air is cleaner, humidity can trigger respiratory issues. Monitoring local conditions and limiting strenuous activity on poor air quality days is crucial year-round.