| Date of Status Change | Record Sequence | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 04/12/2022 | 7 | A | GW | C | 350 | DELPHIAN SCHOOL | 
| 04/12/2022 | 6 | A | GW | NTNC | 350 | DELPHIAN SCHOOL | 
| 05/06/2016 | 5 | A | GW | NTNC | 350 | DELPHIAN FOUNDATION | 
| 02/02/2011 | 4 | A | GW | C | 350 | DELPHIAN FOUNDATION | 
| 05/20/2009 | 3 | A | GW | C | 700 | DELPHIAN FOUNDATION | 
| 10/15/2007 | 2 | A | GW | NTNC | 350 | DELPHIAN FOUNDATION | 
| 11/03/2005 | 1 | A | GW | C | 400 | DELPHIAN FOUNDATION | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Residential | 350 | 1 | 1 | 12 | 31 | 04/11/2022 | |
| Non-transient | 350 | 1 | 1 | 12 | 31 | 10/15/2007 | 04/10/2022 | 
| Non-transient | 350 | 1 | 1 | 12 | 31 | 08/24/2005 | 10/14/2007 | 
| Residential | 400 | 1 | 1 | 12 | 31 | First Record | 08/23/2005 |