COUNTY WATER-SYSTEM LEDGER
Umatilla, Oregon
EPA’s September 2026 export lists 4 active community water systems serving Umatilla, Oregon, with 0 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 Umatilla, Oregon
EPA associates 4 covered systems with Umatilla, Oregon; their reported population-served values total 52,397 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 |
|---|---|---|---|
| Hermiston, City OfOR4100372 | 20,000 | Surface water | No current violation flagged |
| Pendleton, City OfOR4100613 | 16,996 | Surface water | No current violation flagged |
| Umatilla, City OfOR4100914 | 8,256 | Ground water | No current violation flagged |
| Milton-Freewater, City OfOR4100522 | 7,145 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Umatilla, Oregon
EPA classifies 4 systems serving Umatilla, Oregon across 2 primary-source categories; Surface water is the largest category with 2 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.