Public water system · WA5397744
ActiveWinthrop Koa
Transient non-community water system in Okanogan County, Montana, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
77
Service connections
79
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | 3A | 8000 | No | Archived |
| 2025-06-01 | 3A | 8000 | No | Resolved |
| 2025-01-01 | 03 | 1040 | No | Archived |
| 2013-04-01 | 23 | 3100 | No | Resolved |
| 2006-09-01 | 23 | 3100 | No | Archived |
| 2004-09-01 | 23 | 3100 | No | Archived |
| 2000-08-01 | 23 | 3100 | No | Archived |
| 2000-04-01 | 23 | 3100 | No | Archived |
| 1999-06-01 | 23 | 3100 | No | Archived |
| 1999-04-01 | 23 | 3100 | No | Archived |
| 1997-07-01 | 23 | 3100 | No | Archived |
| 1992-08-01 | 23 | 3100 | No | Archived |
Winthrop Koa: frequently asked questions
Is Winthrop Koa's water safe to drink?
Winthrop Koa is an active transient non-community water system regulated under the Safe Drinking Water Act, overseen by the WA state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Winthrop Koa?
Winthrop Koa (PWSID WA5397744) is a private-owned transient non-community water system, regulated by the WA state drinking water program.
How many people does Winthrop Koa serve?
Winthrop Koa reports serving 77 people through 79 service connections in Okanogan County, Montana.
Where does Winthrop Koa get its water?
EPA SDWIS lists this system's primary water source as groundwater.
Other water systems in Okanogan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Omak City of | Okanogan | 4,940 | Community | Groundwater |
| Oroville City of | Okanogan | 3,256 | Community | Groundwater |
| Brewster City of | Okanogan | 3,235 | Community | Groundwater |
| Okanogan Water Department City of | Okanogan | 2,921 | Community | Groundwater |
| Tonasket Water System | Okanogan | 2,392 | Community | Groundwater |
| Pearrygin Lake State Park - Both Cg | Okanogan | 2,103 | Transient non-community | Groundwater |