| Date of Status Change | Record Sequence | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 01/28/2022 | 8 | A | GW | C | 1,398 | CASCADE LOCKS, CITY OF | 
| 01/28/2022 | 7 | A | GW | C | 1,310 | CASCADE LOCKS, CITY OF | 
| 03/11/2021 | 6 | A | GW | C | 1,310 | CASCADE LOCKS, CITY OF | 
| 10/03/2019 | 5 | A | GW | C | 1,125 | CASCADE LOCKS, CITY OF | 
| 06/04/2015 | 4 | A | GW | C | 1,087 | CASCADE LOCKS, CITY OF | 
| 03/12/2010 | 3 | A | GW | C | 1,115 | CASCADE LOCKS, CITY OF | 
| 07/26/2007 | 2 | A | GW | C | 1,113 | CASCADE LOCKS, CITY OF | 
| 08/19/2004 | 1 | A | GW | C | 1,000 | CASCADE LOCKS, CITY OF | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Residential | 1398 | 1 | 1 | 12 | 31 | 11/23/2021 | |
| Residential | 1310 | 1 | 1 | 12 | 31 | 10/17/2018 | 11/22/2021 | 
| Residential | 1125 | 1 | 1 | 12 | 31 | 05/21/2015 | 10/17/2018 | 
| Residential | 1087 | 1 | 1 | 12 | 31 | 12/16/2009 | 05/20/2015 | 
| Residential | 1115 | 1 | 1 | 12 | 31 | 06/01/2007 | 12/15/2009 | 
| Residential | 1113 | 1 | 1 | 12 | 31 | 05/13/2004 | 05/31/2007 | 
| Residential | 1000 | 1 | 1 | 12 | 31 | First Record | 05/12/2004 |