Sandnes, nestled in the Rogaland county of Norway, occupies a geographically significant position within the southwestern region of the country. The city’s landscape is defined by its proximity to the North Sea and the expansive Stavangerfjord, contributing to a maritime climate and influencing local air patterns. Situated on a plateau overlooking the Byfjorden, a branch of the Stavangerfjord, Sandnes benefits from a relatively moderate elevation, averaging around 50-100 meters above sea level. This elevation, combined with the fjord’s influence, often promotes good ventilation, dispersing pollutants effectively. The surrounding terrain is characterized by a mix of rolling hills, agricultural land, and forested areas, creating a distinct urban–rural gradient. To the east, the landscape rises towards the more rugged interior of Rogaland, while to the west, the coastline stretches along the fjord. Historically, the area has been shaped by glacial activity, leaving behind distinctive geological features. Sandnes itself exhibits a compact urban character, with a mix of residential areas, commercial districts, and industrial zones, though industry is less concentrated than in nearby Stavanger. The region’s agricultural practices, primarily focused on livestock and arable crops, contribute minimally to localized air pollution, and the prevailing westerly winds generally carry any potential emissions out to sea, mitigating their impact on the city’s air quality. The city’s location within a relatively sparsely populated region further reduces overall pollution levels.

Sandnes experiences a temperate maritime climate, significantly impacting its air quality throughout the year. Winter months (December-February) often bring periods of calm weather and temperature inversions, where a layer of warm air traps cooler air near the ground. This phenomenon can lead to a temporary stagnation of pollutants, particularly those from residential heating and limited industrial activity. While overall emissions are low, these inversions can create localized pockets of poorer air quality, especially in sheltered areas. Spring (March-May) sees a gradual improvement as winds increase and temperatures rise, effectively dispersing any accumulated pollutants. Summer (June-August) typically boasts the best air quality, with consistent winds and ample sunshine. The long daylight hours and frequent breezes ensure efficient ventilation. Autumn (September-November) marks a transitional period, with decreasing daylight and increasing rainfall. While rainfall helps to cleanse the atmosphere, the return of calmer weather patterns can occasionally trigger short-lived episodes of reduced air quality. Sensitive groups, such as individuals with respiratory conditions and young children, should be mindful during winter inversions and periods of calm weather in autumn. Outdoor activities are generally favoured during the summer months, while spring and autumn offer opportunities with careful monitoring of weather conditions. The relatively mild temperatures and frequent precipitation throughout the year contribute to a generally favourable air quality profile, though vigilance during periods of atmospheric stability is always advisable.