How many states where hammer is not thrown in high school?

There's no readily available, definitive list of US states that *don't* allow the hammer throw in high school. High school athletic associations (like state athletic federations) set their own rules, and participation in track and field events, including the hammer throw, varies. While the hammer throw is common in many states, some smaller schools or those with limited resources might not offer it. There isn't a central database tracking this specifically.