Harvey, IL Night Sky Brightness
Harvey, IL's night sky, measured from orbit
Harvey reads as suburban on this dataset's scale. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. That's brighter than 83.4% of the 3,206 US cities in this dataset.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things, explained in the Bortle scale guide.
The nearest darker sky to Harvey
9 miles from Harvey, straight-line, sits Park Forest, IL, the nearest city here with a darker sky than Harvey's own suburban band.
Park Forest, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Harvey compares nationally
Harvey, IL counts roughly 19,781 residents, among the 3,206 US cities this site tracks. Harvey's position, 2,659 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.