Final answer:
The EMS system operated independently by a municipality and not part of another public safety entity is known as third-service EMS.
Step-by-step explanation:
In a community where the municipality operates the Emergency Medical Services (EMS) agency independently, and it is not part of a public safety entity like the fire department or police department, this arrangement is referred to as third-service EMS. This means that the EMS operates as a separate standalone service. In contrast, fire-based EMS is integrated with the fire department, and hospital-based EMS is operated by a hospital. A hybrid system may combine elements from multiple types of services or involve public-private partnerships.