But only the cities of Baytown and La Porte (of the Houston MSA) are under the 70 dBu of KQBU. Galveston proper is not even under the 70dBu, let alone the cities of League City and Texas City.
The criteria for indoor listening is 65 dbu and for in-car it is 60 dbu. While 54 dbu used to be the de facto metric for in-car, the profusion of new translators and adjacent channel LPFMs and such has made that questionable in reality.