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Cook County manages grants and assessments of brownfields.
Past floods, current risks, and future projections based on peer-reviewed research from the world’s leading flood modelers. Flood Insurance Rate Maps (FIRM, managed by FEMA) take into account watershed risks, and not flooding from precipitation and impervious surfaces.
Every icon on the PurpleAir map represents a public PurpleAir sensor, and the color indicates the real time PM2.5 reading on the US EPA Air Quality Index scale. The sensors with no outline are registered as outdoor sensors and the sensors with black rings are registered as indoor sensors.