| Case Number | Case Title | Open Date | Closed Date |
| 98-0226-WW-AIR | MOHAWK UTILITIES, INC. | 02/04/1998 | 11/19/1998 |
| 98-0326-WW-PWA | CHRISTI WATER SYSTEM, INC. | 02/23/1998 | 03/25/1998 |
| 98-0364-WW-AIS | OHIO-AMERICAN WATER COMPANY | 03/03/1998 | 04/02/1998 |
| 98-0390-WW-UNC | CONSUMERS OHIO WATER COMPANY | 03/06/1998 | 04/19/2001 |
| 98-1012-WW-AIR | SHEPARD HILLS WATER COMPANY | 07/05/1998 | 03/25/1999 |
| 98-1073-WW-UNC | COUNTRY CLUB UTILITIES | 07/23/1998 | 09/30/1998 |
| 98-1158-WW-MER | CONSUMERS WATER/PHILADELPHIA SUBURB | 08/18/1998 | 02/04/1999 |