 Plus more. To learn more about Quality Water Systems and what their customers are saying, visit drinkquality.com. For more than a century, AM radio has evolved to meet the needs of our community. In their car, at home, or on the job, more than 80 million listeners depend on AM radio each month. AM radio is also the backbone of the emergency alert system, which keeps us safe in dangerous times. It's reliable, free, and public safety depends on it.