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Rating

Low Pollen Burden

Scale55-100

Higher values are better.

About This Ranking

Goal

Highlight places with lower combined tree, grass, and ragweed pollen burden using historical pollen observations blended with longer-run environmental models.

Sources

Data behind the rating

3 sources
Data
NOAA NCEI 1991-2020 station normals matched to places using nearby stations, with distance and elevation mismatch penalties.
What it tells us
Provides typical annual heat, cold, precipitation, and snowfall conditions from nearby weather stations, not a block-level microclimate or future climate projection.
Data
NOAA NCEI 1991-2020 hourly station normals used to derive typical relative humidity, dew point, heat-index, and wind exposure at each place.
What it tells us
Provides typical hourly dampness, sticky-air, heat-index, and wind conditions from nearby stations, not indoor measurements, current weather, or a hyperlocal microclimate.
Data
EPA ecological-region polygons used as a regional vegetation and species-range proxy for pollen potential.
What it tells us
Supplies broad regional vegetation context for tree, grass, and weed/ragweed potential; it does not measure local plant abundance or pollen.

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