| Date of Status Change | Record Sequence | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 12/14/2020 | 8 | A | GW | C | 16,185 | TROUTDALE, CITY OF | 
| 12/14/2020 | 7 | A | GW | C | 16,020 | TROUTDALE, CITY OF | 
| 06/03/2015 | 6 | A | GW | C | 16,000 | TROUTDALE, CITY OF | 
| 11/30/2012 | 5 | A | GW | C | 15,110 | TROUTDALE, CITY OF | 
| 03/27/2007 | 4 | A | GW | C | 14,880 | TROUTDALE, CITY OF | 
| 05/16/2006 | 3 | A | GW | C | 14,300 | TROUTDALE, CITY OF | 
| 04/26/2004 | 2 | A | GW | C | 14,140 | TROUTDALE, CITY OF | 
| 01/09/2003 | 1 | A | GW | C | 14,040 | TROUTDALE, CITY OF | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Residential | 16185 | 1 | 1 | 12 | 31 | 10/20/2020 | |
| Residential | 16020 | 1 | 1 | 12 | 31 | 05/14/2015 | 10/19/2020 | 
| Residential | 16000 | 1 | 1 | 12 | 31 | 11/30/2012 | 05/13/2015 | 
| Residential | 15110 | 1 | 1 | 12 | 31 | 03/27/2007 | 11/29/2012 | 
| Residential | 14880 | 1 | 1 | 12 | 31 | 04/13/2006 | 03/26/2007 | 
| Residential | 14300 | 1 | 1 | 12 | 31 | 04/26/2004 | 04/12/2006 | 
| Residential | 14140 | 1 | 1 | 12 | 31 | 09/05/2001 | 04/25/2004 | 
| Residential | 14040 | 1 | 1 | 12 | 31 | First Record | 09/04/2001 |