Some other local information:
Greenville's Med-helicopter is called Med Trans One. Med-Trans One is an independent Air Medical Service located at Donaldson Center, outside Greenville, SC. Here is its coverage area:
Columbia has three med-helicopters. Two are called "CareForce." Both are owned by Palmetto Health and based at Palmetto Richland (one of many of their hospitals). The other is owned by Providence Hospital and it is called "Life Reach." I couldn't find a map of its service area, however, it inclues the Counties in SC west of Greenville, Southwestern NC, and Northeastern GA.
Charleston's is called Meducare. It seems to also be an independant Air Med-Service. Here is its Service radius:
It seems that only Level 3 trauma centers have helicopters. In SC the level 3 trauma centers are in Greenville, Spartanburg, Columbia, and Charleston. Florence's McLeod Health is a Level 2, and it serves a 12 county area that includes parts of NC.