Brentwood, CA Night Sky Brightness
Brentwood, CA's night sky, measured from orbit
Brentwood reads as suburban edge on this dataset's scale. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 31.9% of the 3,206 cities measured here read darker than Brentwood.
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.
Where to go for a darker sky near Brentwood
16 miles from Brentwood, straight-line, sits Danville, CA, the nearest city here with a darker sky than Brentwood's own suburban edge band.
Danville, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Brentwood compares nationally
Brentwood, CA has a population of about 66,286, one of 3,206 US cities of 10,000 or more residents in this dataset. Brentwood's position, 1,018 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.