Garfield County, Washington — public water systems
At a glance
9 active public water systems are filed under Garfield County, Washington in EPA's SDWIS records, together reporting 3,712 people served. The largest is City of Pomeroy, which reports serving 1,395 people. 3 are community water systems serving people where they live; the other 6 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
9
Population served
3.7K
Community systems
3
Groundwater share
100%
How does Garfield County compare with other Washington counties?
Garfield County has the 39th-most active public water systems among the 72 counties listed for active Washington systems in EPA records; among the 44 with 3 or more systems, the median has 75. Its systems report 3,712 people served in total, the 39th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 412 people, well below the Washington average of 2,172. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Garfield County's drinking water come from?
By primary water source, Garfield County's active systems draw on groundwater (9, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 94% and 5.7% across Washington. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Pomeroy, draws primarily on groundwater.
What kinds of water systems operate in Garfield County?
Garfield County's active systems break down as 3 community systems (33%), 1 non-transient non-community systems (11%) and 5 transient non-community systems (56%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (44%), local government (22%), federal government (22%) and state government (11%).
Water systems in Garfield County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Pomeroy City of | Garfield | 1,395 | Community | Groundwater |
| 2 | Garfield County Fairgrounds | Garfield | 1,250 | Transient non-community | Groundwater |
| 3 | Alpowa Summit Rest Area | Garfield | 801 | Transient non-community | Groundwater |
| 4 | Lower Granite Lock & Dam | Garfield | 120 | Non-transient non-community | Groundwater |
| 5 | Usace Illia Residential Area | Garfield | 46 | Community | Groundwater |
| 6 | Hiway Trailer Court | Garfield | 36 | Community | Groundwater |
| 7 | Dye Seed Ranch 1 | Garfield | 30 | Transient non-community | Groundwater |
| 8 | Van Vogt Water System | Garfield | 25 | Transient non-community | Groundwater |
| 9 | Bakers Pond Water Users Corp | Garfield | 9 | Transient non-community | Groundwater |
Garfield County water systems: frequently asked questions
How many public water systems are in Garfield County, Washington?
EPA's SDWIS records file 9 active public water systems under Garfield County, Washington: 3 community systems (33%), 1 non-transient non-community systems (11%) and 5 transient non-community systems (56%).
Who supplies drinking water in Garfield County, WA?
The largest community water systems filed under Garfield County are City of Pomeroy (1,395 people served), Usace Illia Residential Area (46 people served) and Hiway Trailer Court (36 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Garfield County's drinking water come from groundwater or surface water?
Of the 9 active public water systems in Garfield County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Pomeroy, uses groundwater.
Where can I find a water quality report for Garfield County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 3 community systems are filed under Garfield County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Garfield County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Washington water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Garfield County, Washington”, https://aquacensus.com/water-systems/washington/garfield (data as of October 1, 2026).