How dark is the sky in Peoria, AZ?

Peoria's sky measures dark sky here. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Peoria's sky is brighter than 0.3% of the 3,206 cities in this dataset.

Worth remembering: this is satellite radiance, not a ground observation. A true Bortle rating needs a human eye at night, this is the closest large-scale substitute.

Peoria is already about as dark as this dataset gets

Nothing in this dataset's 3,206 US cities measures a darker sky than Peoria. That doesn't mean nowhere is darker, unincorporated land and wilderness aren't part of this dataset at all, only incorporated cities of 10,000 people or more.

Peoria against the rest of the dataset

Peoria, AZ has a population of about 199,924, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Peoria ranks 11 from darkest to brightest, 1 being the darkest measured.