Prison security levels categorize facilities based on the risk posed by their inmates. There are typically four main levels: minimum, medium, maximum, and supermax. Minimum security prisons house non-violent offenders and have fewer restrictions, while maximum security facilities are designed for dangerous criminals and have strict security measures. Supermax prisons, like ADX Florence, are the most secure, housing inmates who pose extreme risks to safety. Each level determines the type of security measures, inmate privileges, and rehabilitation programs available, ensuring that the environment matches the needs and risks of the incarcerated individuals.