| Date of Status Change | Record Sequence | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 11/17/2020 | 5 | A | GW | C | 200 | WALNUT MOBILE HOME PARK | 
| 11/17/2020 | 4 | A | GW | C | 175 | WALNUT MOBILE HOME PARK | 
| 01/24/2018 | 3 | A | GW | C | 90 | WALNUT MOBILE HOME PARK | 
| 02/15/2006 | 2 | A | SWP | C | 90 | WALNUT MOBILE HOME PARK | 
| 02/15/2006 | 1 | A | GW | C | 90 | WALNUT MOBILE HOME PARK | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Residential | 200 | 1 | 1 | 12 | 31 | 10/06/2020 | |
| Residential | 175 | 1 | 1 | 12 | 31 | 10/05/2017 | 10/05/2020 | 
| Residential | 90 | 1 | 1 | 12 | 31 | First Record | 10/04/2017 |