The Centre Area Transportation Authority (CATA) operates in Centre County, Pennsylvania, serving the State College region. This system has made a point of making its fleet 100% CNG, with it’s last diesel buses being retired the summer of 2009. Part of the reason that this is a 100% CNG fleet is because the State College region is rich in natural gas.
Active Bus Fleet (Click Here for pictures):
| Fleet Number | Year | Manufacturer | Model | Length | Additional Notes |
| 38-47 | 1997 | New Flyer | C35LF | 35 feet | ex-Orlando LYNX |
| 48-49 | 1997 | New Flyer | C35LF | 35 feet | ex-York Transit |
| 50-65 | 1996 | Orion | V | 40 feet | last high floor buses |
| 66-77 | 1997/8 | New Flyer | C35LF | 35 feet | 48, 49, 66-73 have all received overhauls w/ LED signs |
| 78-83 | 1998 | New Flyer | C40LF | 40 feet | |
| 84-93 | 2000 | New Flyer | C40LF | 40 feet | 85 is fueled by a hydrogen/CNG mixture |
| 94-97 | 2002 | El Dorado | E-Z Rider | 30 feet | |
| 98-99 | ? | New Flyer | C40LF | 40 feet | ex- Indiana, PA |