| Date of Status Change | Active or Inactive | Primary Source | PWS Type | Population | PWS Name | 
| Current Status 03/28/2025 | A | GW | C | 3,940 | MADRAS, CITY OF | 
| 03/11/2020 | A | GW | C | 3,494 | MADRAS, CITY OF | 
| 05/17/2016 | A | GW | C | 3,301 | MADRAS, CITY OF | 
| 10/07/2011 | A | GW | C | 3,300 | MADRAS, CITY OF | 
| 10/05/2011 | A | GW | C | 3,435 | MADRAS, CITY OF | 
| 12/05/2002 | A | GW | C | 3,420 | MADRAS, CITY OF | 
| 04/09/2002 | A | GW | C | 2,797 | MADRAS, CITY OF | 
| Population Type | Avg Daily Population | Start Month | Start Day | End Month | End Day | Effective Begin Date | Effective End Date | 
| Residential | 3940 | 1 | 1 | 12 | 31 | 03/11/2020 | |
| Residential | 3494 | 1 | 1 | 12 | 31 | 07/17/2013 | 03/10/2020 | 
| Residential | 3301 | 1 | 1 | 12 | 31 | 09/29/2010 | 07/16/2013 | 
| Residential | 3435 | 1 | 1 | 12 | 31 | 11/01/2002 | 09/28/2010 | 
| Residential | 3420 | 1 | 1 | 12 | 31 | First Record | 10/31/2002 |