| Case Number | Case Title | Open Date | Closed Date |
| 04-1261-WS-AIS | OHIO AMERICAN WATER COMPANY | 08/10/2004 | 04/14/2007 |
| 71-0465-WS-AIS | LAKE WAYNOKA UTILITIES INC ATED | 07/26/1971 | 08/11/1976 |
| 75-0499-WS-AIS | MAD RIVER UTILITY COMPANY | 07/03/1975 | 09/22/1975 |
| 81-0698-WS-AIS | LAKESIDE UTILITIES CORPORATION | 06/12/1981 | 06/02/1982 |
| 88-0985-WS-AIS | WOODBRAN REALTY CORPORATION | 06/30/1988 | 08/02/1988 |
| 88-1984-WS-AIS | SALT FORK UTILITY COMPANY | 12/29/1988 | 01/31/1989 |
| 89-0648-WS-AIS | OHIO SUBURBAN WATER COMPANY | 04/26/1989 | 05/09/1989 |
| 91-1501-WS-AIS | OHIO SUBURBAN WATER COMPANY | 08/12/1991 | 09/12/1991 |
| 91-1594-WS-AIS | OHIO SUBURBAN WATER COMPANY | 08/28/1991 | 10/17/1991 |
| 92-0925-WS-AIS | OHIO SUBURBAN WATER COMPANY | 05/20/1992 | 07/09/1992 |
| 92-1199-WS-AIS | OHIO SUBURBAN WATER COMPANY | 07/08/1992 | 07/23/1992 |