COUNTY WATER-SYSTEM LEDGER
Douglas, Colorado
EPA’s September 2026 export lists 13 active community water systems serving Douglas, Colorado, with 1 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Douglas, Colorado
EPA associates 13 covered systems with Douglas, Colorado; their reported population-served values total 405,941 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Castle Rock Town OfCO0118010 | 110,298 | Surface water | No current violation flagged |
| Highlands Ranch WsdCO0118015 | 103,444 | Surface water | No current violation flagged |
| Parker WsdCO0118040 | 75,949 | Surface water | No current violation flagged |
| Meridian MdCO0218015 | 23,415 | Surface water purchased | No current violation flagged |
| Stonegate MdCO0118076 | 15,295 | Surface water purchased | No current violation flagged |
| Roxborough WsdCO0118055 | 13,765 | Surface water | No current violation flagged |
| Pinery WwdCO0118025 | 12,901 | Surface water purchased | No current violation flagged |
| Castle Pines North MdCO0118006 | 12,800 | Surface water purchased | No current violation flagged |
| Sterling Ranch CabCO0118724 | 11,501 | Surface water purchased | No current violation flagged |
| Cottonwood WsdCO0118020 | 10,867 | Surface water purchased | No current violation flagged |
| Northern Douglas County WsdCO0118016 | 6,160 | Surface water purchased | No current violation flagged |
| Castle Pines Village MdCO0118005 | 5,656 | Ground water | Other current violation flag |
| Perry Park WsdCO0118045 | 3,890 | Groundwater under influence of surface water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Douglas, Colorado
EPA classifies 13 systems serving Douglas, Colorado across 4 primary-source categories; Surface water is the largest category with 4 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.