| LEVEL | COMPANY | CITY | STATE |
| Enhanced | Ames Municipal Airport | Ames | IA |
| Assoc | Anderson-Bogert Engineers & Surveyors Inc | Cedar Rapids | IA |
| Assoc | Applied Pavement Technology Inc | Urbana | IL |
| Enhanced | Arthur N Neu Municipal Airport | Carroll | IA |
| Assoc | Asphalt Paving Association of Iowa | Ames | IA |
| Gen Svc | Audubon County Airport Authority | Audubon | IA |
| Gen Svc | Bloomfield Municipal Airport | Bloomfield | IA |
| Enhanced | Boone Municipal Airport | Boone | IA |
| Assoc | Burns & McDonnell Engineering Co | Kansas City | MO |
| Gen Svc | Chariton Municipal Airport | Chariton | IA |
| Gen Svc | Cherokee Aviation Authority | Cherokee | IA |
| Enhanced | City of Algona | Algona | IA |
| Enhanced | City of Davenport | Davenport | IA |
| Basic | City of Eagle Grove | Eagle Grove | IA |
| Gen Svc | City of Harlan | Harlan | IA |
| Gen Svc | City of Jefferson Airport | Jefferson | IA |
| Gen Svc | City of LeMars | LeMars | IA |
| Basic | City of Manchester | Manchester | IA |
| Enhanced | City of Monticello | Monticello | IA |
| Gen Svc | City of Sioux Center | Sioux Center | IA |
| Enhanced | City of Spencer | Spencer | IA |
| Basic | City of Woodbine | Woodbine | IA |
| Assoc | Clapsaddle-Garber Assoc | Marshalltown | IA |
| Enhanced | Clinton Municipal Airport | Clinton | IA |
| Assoc | Coffman Associates Inc | Lee's Summit | MO |
| Enhanced | Council Bluffs Airport Authority | Council Bluffs | IA |
| Assoc | Crawford Murphy & Tilly Inc | Springfield | IL |
| Basic | Cresco Municipal Airport | Cresco | IA |
| Enhanced | Denison Airport Commission | Denison | IA |
| Assoc | Des Moines Flying Service | Des Moines | IA |
| Comm Svc | Des Moines International Airport | Des Moines | IA |
| Assoc | DeWild Grant Reckert & Assoc Co | Rock Rapids | IA |
| Assoc | Dubuque Area Chamber of Commerce | Dubuque | IA |
| Comm Svc | Dubuque Regional Airport | Dubuque | IA |
| Assoc | Earth Tech Inc | Des Moines | IA |
| Comm Svc | Eastern Iowa Airport | Cedar Rapids | IA |
| Assoc | Erect-A-Tube | Harvard | IL |
| Enhanced | Estherville Municipal Airport | Estherville | IA |
| Gen Svc | Exec 1 Aviation | Ankeny | IA |
| Enhanced | Fairfield Municipal Airport | Fairfield | IA |
| Gen Svc | Forest City Municipal Airport | Forest City | IA |
| Comm Svc | Fort Dodge Regional Airport | Fort Dodge | IA |
| Assoc | French-Reneker Assoc Inc | Fairfield | IA |
| Assoc | Garden & Associates Ltd | Oskaloosa | IA |
| Assoc | Gee Asphalt Systems Inc | Cedar Rapids | IA |
| Gen Svc | Greenfield Municipal Airport | Greenfield | IA |
| Basic | Guthrie County Regional Airport | Guthrie Center | IA |
| Assoc | HNTB Corporation | Overland Park | KS |
| Assoc | Howard R Green Company | Cedar Rapids | IA |
| Assoc | HWS Consulting Group Inc | Ames | IA |
| Enhanced | Independence Municipal Airport | Independence | IA |
| Enhanced | Iowa City Municipal Airport | Iowa City | IA |
| Assoc | Iowa Concrete Paving | Ankeny | IA |
| Gen Svc | Iowa Falls Municipal Airport | Iowa Falls | IA |
| Assoc | JEO Consulting Group Inc | Wahoo | NE |
| Assoc | JFSCO Engineering | Red Oak | IA |
| Enhanced | Keokuk Municipal Airport | Keokuk | IA |
| Assoc | Kirkham Michael & Associates | Des Moines | IA |
| Basic | Lake Mills Municipal Airport | Lake Mills | IA |
| Comm Svc | Mason City Municipal Airport | Mason City | IA |
| Assoc | McClure Engineering Company | Fort Dodge | IA |
| Assoc | McClure Engineering Company | Johnston | IA |
| Assoc | Mead & Hunt Inc | Madison | WI |
| Basic II | Milford Municipal Airport Commission | Milford | IA |
| Assoc | Newton Home Oil Co Inc | Newton | IA |
| Enhanced | Newton Municipal Airport | Newton | IA |
| Enhanced | Oelwein Airport Commission | Maynard | IA |
| Basic | Onawa Municipal Airport | Onawa | IA |
| Basic | Osage Municipal Airport | Osage | IA |
| Enhanced | Osceola Municipal Airport | Osceola | IA |
| Enhanced | Ottumwa Industrial Airport | Ottumwa | IA |
| Gen Svc | Pella Municipal Airport | Pella | IA |
| Gen Svc | Pocahontas Municipal Airport | Pocahontas | IA |
| Basic II | Primghar Municipal Airport | Primghar | IA |
| Assoc | Quad City international Airport | Moline | IL |
| Gen Svc | Rock Rapids Airport Commission | Rock Rapids | IA |
| Basic | Rockwell City Municipal Airport | Rockwell City | IA |
| Gen Svc | Sac City Municipal Airport | Sac City | IA |
| Enhanced | Shenandoah Regional Airport | Shenandoah | IA |
| Assoc | Siemens Airfield Solutions | Columbus | OH |
| Assoc | Snyder & Associates Inc | Ankeny | IA |
| Comm Svc | Southeast Iowa Regional Airport Authority | Burlington | IA |
| Basic | Spirit Lake Airport | Okoboji | IA |
| Enhanced | Storm Lake Airport Commission | Storm Lake | IA |
| Gen Svc | Tipton Airport Committee | Tipton | IA |
| Assoc | Trans-Iowa Equipment Inc | Ankeny | IA |
| Assoc | Ulteig Engineers | Fargo | ND |
| Gen Svc | Vinton Veterans Memorial Airpark | Vinton | IA |
| Enhanced | Washington Municipal Airport | Washington | IA |
| Comm Svc | Waterloo Regional Airport | Waterloo | IA |
| Gen Svc | Waverly Municipal Airport/City of Waverly | Waverly | IA |
| Enhanced | Webster City Municipal Airport | Webster City | IA |