Magnum Scuba -
 Full service SCUBA diving facility. Training, equipment sales, rental and repairs, dive travel, air-fills and visual cylinder inspections. Located in the South Loop/Burnham Park area of downtown Chicago.
http://www.magnumscuba.com/

Mermet Springs -
 An 8.5 acre spring fed stone quarry devoted to diving and dive training, located in Southern Illinois and featuring 120 foot depth and a sunken Boeing 727. News, events, prices, rentals, directions, accommodations, photos, and contact information.
http://www.mermetsprings.com/

Midwest Diving Specialists -
 A 5-Star PADI facility providing training, sales, travel and service of Dacor and Sherwood regulators and BCDs for SCUBA diving. Located in Normal.
http://www.mds-scuba.com/

Midwest SCUBA Center -
 Full service dive shop. Training schedules, SCUBA equipment sales and service, rentals, trips, and contact information. Located in Champaign, in East-Central Illinois.
http://www.mscscuba.com/

Narked Sharks Scuba Diving Club -
 Group of recreational, wreck, cave and technical divers located in the Naperville area, in the suburbs west of Chicago. Member contact list, calendar, meeting minutes, and photos.
http://www.geocities.com/narkedsharks/

Nordic Diver -
Charter diving service offering shipwreck diving trips on Lake Michigan and Lake Superior. Dates, locations, photo album, contacts, and information request form.
http://www.nordicdiver.com/

Omni Scuba -
 Full service dive shop. Training, equipment, newsletter, events, photos, and contact information. Located near the Brickyard Quarry dive area near St. Elmo in South-Central Illinois.
http://www.omniscuba.com/

Pearl Lake Resort -
Offers camping, SCUBA diving (85 foot maximum depth), swimming, restaurant, and RV sales and service. Located in South Beloit, on the Illinois-Wisconsin state line. Map, calendar, and contacts.
http://www.pearllake.com/