Fountain Hills, AZ: how dark is the sky here?
Fountain Hills's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. That's brighter than 12% of the 3,206 US cities in this dataset.
This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.
The nearest darker sky to Fountain Hills
Peoria, AZ, about 35 miles away as the crow flies, measures in the dark sky band, one step darker than Fountain Hills. Actual driving distance will run longer than that straight-line figure.
Peoria, AZ is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Fountain Hills compares nationally
Fountain Hills, AZ has a population of about 23,696, one of 3,206 US cities of 10,000 or more residents in this dataset. Fountain Hills places 383 of 3,206 cities in this dataset's darkest-to-brightest order.