| 1 | GSWX | G&S Co., Inc. | added 1/1980; 1/1980; eliminated 4/1988 | | NAKINA |
| 2 | GSWX | Glen Summit Springs Water Co., Inc. | 7/1935-1/1950 | | NAKINA |
| 3 | GSWX | Glen Summit Springs Water Co., Inc. | Apr-38 | | NRHS |
| 4 | GSWX | G&S Co., Inc. | added 1/80; 1/80; eliminated 4/88 | | NRHS |
| 5 | GSWX | *GLEN SUMMIT SPRINGS WATER CO., INC. | | | PWRC |
| 6 | GSWX | *G & S SUPPLY INC. | | | PWRC |
| 7 | GSWX | G and S Supply | | | RSRV |
