Baturité, nestled in the Serra do Baturité mountain range within Ceará state, Brazil, occupies a geographically significant position within the broader Northeast region. Located approximately 75 kilometers west of Fortaleza, the state capital, Baturité’s coordinates (-4.3289, -38.8850) place it at an elevation of around 520 meters above sea level, contributing to a cooler, more humid microclimate compared to the coastal plains. The surrounding landscape is characterized by rolling hills, dense Atlantic Forest remnants, and small agricultural plots, creating a distinct urban–rural gradient. The city itself exhibits a charming, colonial-era urban character, with a central plaza and traditional architecture. While not directly adjacent to major rivers, several smaller streams and springs originate within the Serra do Baturité, influencing local humidity and vegetation. The region’s economy is a blend of agriculture (primarily fruit cultivation, particularly mangoes and bananas), small-scale industry, and tourism, driven by the area’s natural beauty and ecotourism potential. Importantly, Baturité’s location within a mountainous terrain can lead to localized air quality challenges. Topography can trap pollutants, particularly during periods of low wind speed. The proximity to agricultural zones introduces potential sources of particulate matter from farming practices, while the gradual industrial development in the wider Ceará region can contribute to regional pollution transport. The Atlantic Forest, while a vital carbon sink, can also release biogenic volatile organic compounds (BVOCs) which react in the atmosphere.

Baturité experiences a tropical climate with a distinct wet and dry season, significantly influencing its air quality profile. The dry season, typically spanning from July to November, is characterized by lower rainfall and higher temperatures. This period often sees a slight increase in particulate matter concentrations, primarily due to agricultural activities like controlled burns for land preparation, a common practice in the surrounding rural areas. Reduced rainfall also means less atmospheric cleansing through precipitation. Conversely, the wet season (December to June) brings frequent rainfall and higher humidity, naturally scrubbing the atmosphere and generally improving air quality. During the wettest months (January-March), the increased cloud cover can also reduce solar radiation, impacting photochemical reactions that form ozone. Fog, though infrequent, can occur during cooler periods, particularly in the higher elevations of the Serra do Baturité, trapping pollutants near the ground and temporarily worsening local air quality. Wind patterns are generally variable, but periods of calm winds, especially during the dry season, exacerbate pollution accumulation. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during agricultural burning periods. While the wet season generally offers cleaner air, periods of heavy rainfall can occasionally lead to localized flooding and associated dust resuspension. Outdoor activities are generally more favorable during the wet season, but awareness of potential localized dust events remains important.