| Date of Status Change | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 08/26/2009 | I | GW | NP | 16 | LOLO WATER CO | 
| 08/26/2009 | A | GW | NP | 16 | LOLO WATER CO | 
| 02/01/2006 | A | GW | NP | 16 | LOLO WATER CO. | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Non-transient | 16 | 1 | 1 | 12 | 31 | 12/22/1992 |