Mermet Springs, Southern Illinois

This dive site, Mermet Springs, is a full-service freshwater training facility in Southern Illinois. It serves dive shops, instructors, students, and certified divers of all levels. As a spring-fed quarry, navigation is straightforward with clear pathways and submerged attractions, making it ideal for instruction and recreational dives.
The main attractions are the diverse aquatic life, including large schools of American Paddlefish (Spoonbill), sizable bluegill, and impressive giant catfish. Lucky divers might also encounter the rare freshwater jellyfish, adding a unique element to the underwater ecosystem.
The best time to visit Mermet Springs is typically from spring through fall, offering warmer water temperatures and pleasant diving conditions. It is perfectly suited for both scuba divers and freedivers seeking an accessible freshwater experience, offering excellent opportunities for training, skill development, and observing unique freshwater fauna.