Here's where they stand near the end of the season (** have GAA at/below 1.00):
School Rank – Goal Against Average (GAA)
(1) NW: 0.48**
(2) HH: 1.00**
(3) FM: 0.54**
(4) SV: 0.73**
(5) SA: 1.24
(6) Irmo: 1.13
(7) Wando: 0.48**
(8) Lexington: 1.16
(9) DF: 1.32
(10) JI: 0.96**
(11) WA: 1.48
(12) Dorman: 0.96**
(13) Mauldin 1.00**
(14) Greenwood: 1.39
(15) Wren: 1.24

Some other's you've mentioned:
Greenville: 0.17**
Dreher: 1.04
BE: 0.92**
Beaufort: 1.19