Chili Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Chili, New York, nestled within Ontario County, occupies a geographically significant position in the Finger Lakes region. Situated at approximately 43.08°N, 77.75°W, the town’s terrain is characterized by gently rolling hills and valleys, typical of the glaciated landscape that defines the region. Its elevation averages around 430 feet above sea level, contributing to localized microclimates and influencing air circulation patterns. The town lies close to the eastern shore of Chili Pond, a small lake that can influence humidity and local weather conditions. The surrounding landscape is a blend of agricultural land – primarily vineyards and orchards, reflecting the region’s strong agricultural heritage – and forested areas, providing some natural air filtration. Chili’s proximity to Rochester, a larger urban center approximately 10 miles to the north, is a crucial factor in its air quality profile. Rochester’s industrial history and ongoing commercial activity contribute to regional pollution transport. The urban–rural gradient is relatively sharp; Chili maintains a predominantly suburban character with pockets of rural farmland, meaning that while it isn't a major industrial hub itself, it's susceptible to pollutants originating from the larger metropolitan area. Prevailing winds generally flow from the southwest, carrying potential pollutants from Rochester and the broader Genesee Valley towards Chili. The region's climate, with distinct seasonal changes, further complicates air quality dynamics, impacting temperature inversions and atmospheric stability.

Chili’s air quality experiences a distinct seasonal cycle driven by meteorological factors. During the warmer months (June-August), convective mixing – the rising of warm air – generally disperses pollutants, leading to relatively better air quality. However, periods of stagnant air, particularly during heatwaves, can trap pollutants near the ground. Fall (September-November) often sees a transition period; cooler temperatures and decreasing sunlight can lead to increased nighttime inversions, where a layer of cool, dense air becomes trapped beneath a layer of warmer air, preventing vertical mixing and concentrating pollutants. This is a period when air quality can deteriorate rapidly. Winter (December-February) presents a complex scenario. Cold temperatures and frequent fog events can trap pollutants close to the surface, exacerbating issues. Snow cover can also reduce particulate matter resuspension, offering some mitigation. Spring (March-May) brings a gradual improvement as temperatures rise and convective mixing increases, but early spring can still be affected by lingering inversions and agricultural activities. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should be particularly cautious during fall and winter months, limiting outdoor exertion on days with poor air quality. Agricultural burning, a practice sometimes employed in the region, can also contribute to localized pollution spikes, particularly in the spring. Monitoring local weather forecasts and air quality reports is crucial for informed decision-making regarding outdoor activities.