When a new football stadium was built at South Alabama, located in one of America's rainiest cities, the decision was made to go with an artificial turf playing surface. At San Diego State, where the weather seems almost always perfect, going with a grass field was an easy choice — but not the usual one in major college football. Of the 133 schools that currently compete in the top-tier of NCAA Division I, 94 have artificial surface football fields (71%) and 39 have grass (29%), most of those at Power Five schools that can afford the upkeep and maintenance.