Heath, TX: how dark is the sky here?
Heath's sky measures suburban edge here. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Heath's sky is brighter than 26.4% of the 3,206 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.
Where to go for a darker sky near Heath
30 miles from Heath, straight-line, sits Red Oak, TX, the nearest city here with a darker sky than Heath's own suburban edge band.
Red Oak, TX is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Heath compares nationally
Heath, TX has a population of about 11,499, one of 3,206 US cities of 10,000 or more residents in this dataset. Heath places 841 of 3,206 cities in this dataset's darkest-to-brightest order.