Grays Harbor County, Washington — public water systems
At a glance
88 active public water systems are filed under Grays Harbor County, Washington in EPA's SDWIS records, together reporting 89,150 people served. The largest is City of Aberdeen, which reports serving 22,867 people. 35 are community water systems serving people where they live; the other 53 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
88
Population served
89.2K
Community systems
35
Groundwater share
96.6%
How does Grays Harbor County compare with other Washington counties?
Grays Harbor County has the 19th-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 89,150 people served in total, the 18th-largest county figure in the state and 0.9% of the statewide total. The average system here reports serving 1,013 people, about half of 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 Grays Harbor County's drinking water come from?
By primary water source, Grays Harbor County's active systems draw on groundwater (83, 94%), surface water (2, 2.3%), purchased surface water (1, 1.1%) and groundwater under influence of surface water (1, 1.1%). Overall, 97% rely mainly on groundwater (including purchased groundwater) and 3.4% 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 Aberdeen, draws primarily on surface water.
What kinds of water systems operate in Grays Harbor County?
Grays Harbor County's active systems break down as 35 community systems (40%), 6 non-transient non-community systems (6.8%) and 47 transient non-community systems (53%). 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 (70%), local government (24%), federal government (3.4%) and state government (2.3%).
The 50 largest water systems in Grays Harbor County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Aberdeen City of | Grays Harbor | 22,867 | Community | Surface water |
| 2 | Hoquiam Water Department | Grays Harbor | 11,456 | Community | Surface water |
| 3 | Ocean Shores Water Dept | Grays Harbor | 9,347 | Community | Groundwater |
| 4 | Elma City of | Grays Harbor | 6,638 | Community | Groundwater |
| 5 | Montesano City of | Grays Harbor | 6,204 | Community | Groundwater |
| 6 | Westport Water Department | Grays Harbor | 5,346 | Community | Groundwater |
| 7 | Grays Harbor Co Water Dist 2 | Grays Harbor | 5,112 | Community | Groundwater |
| 8 | Mccleary City of | Grays Harbor | 2,753 | Community | Groundwater |
| 9 | Pacific Beach/Moclips | Grays Harbor | 2,372 | Community | Groundwater |
| 10 | Cosmopolis Water Department | Grays Harbor | 1,812 | Community | Purchased surface water |
| 11 | Hogans Corner | Grays Harbor | 1,458 | Community | Groundwater |
| 12 | Oakville City of | Grays Harbor | 1,325 | Community | Groundwater |
| 13 | Grays Harbor Co Water Dist 1 | Grays Harbor | 1,302 | Community | Groundwater |
| 14 | Elma Rest Area | Grays Harbor | 1,122 | Transient non-community | Groundwater |
| 15 | Lake Quinault | Grays Harbor | 1,003 | Community | Groundwater |
| 16 | Illahee Oyehut | Grays Harbor | 971 | Community | Purchased groundwater |
| 17 | Ocean Breeze Resort | Grays Harbor | 687 | Transient non-community | Groundwater |
| 18 | Satsop Business Park | Grays Harbor | 544 | Non-transient non-community | Groundwater under influence of surface water |
| 19 | Wynoochee Wildwood Park | Grays Harbor | 471 | Transient non-community | Groundwater |
| 20 | Greenwood Mobile Home Park | Grays Harbor | 350 | Community | Groundwater |
| 21 | Ocean Shores Outdoor Club | Grays Harbor | 309 | Transient non-community | Groundwater |
| 22 | Haven By the Sea | Grays Harbor | 308 | Community | Groundwater |
| 23 | Griffith Priday State Park | Grays Harbor | 280 | Transient non-community | Groundwater |
| 24 | Surfcrest Properties LLC | Grays Harbor | 256 | Transient non-community | Groundwater |
| 25 | Ocean City | Grays Harbor | 237 | Community | Groundwater |
| 26 | Neilton Meadowland Wd 8 A | Grays Harbor | 222 | Community | Groundwater |
| 27 | Meadowood Development | Grays Harbor | 220 | Community | Groundwater |
| 28 | Monte View Estates | Grays Harbor | 200 | Community | Groundwater |
| 29 | Malone | Grays Harbor | 181 | Community | Groundwater |
| 30 | Green Lantern Pub | Grays Harbor | 175 | Transient non-community | Groundwater |
| 31 | Sea View | Grays Harbor | 170 | Community | Groundwater |
| 32 | Coho Campground | Grays Harbor | 152 | Transient non-community | Groundwater |
| 33 | Country Estates | Grays Harbor | 150 | Community | Groundwater |
| 34 | Briggs Nursery | Grays Harbor | 150 | Non-transient non-community | Groundwater |
| 35 | Gold Beach Aviation | Grays Harbor | 134 | Transient non-community | Groundwater |
| 36 | Iron Springs Resort | Grays Harbor | 120 | Transient non-community | Groundwater |
| 37 | Clarks Restaurant | Grays Harbor | 109 | Transient non-community | Groundwater |
| 38 | Humptulips Grocery | Grays Harbor | 105 | Transient non-community | Groundwater |
| 39 | Bay City Sausage | Grays Harbor | 104 | Transient non-community | Groundwater |
| 40 | South Arbor | Grays Harbor | 101 | Transient non-community | Groundwater |
| 41 | Humptulips Grange #730 | Grays Harbor | 100 | Transient non-community | Groundwater |
| 42 | Ocean Spray Cranberries | Grays Harbor | 100 | Non-transient non-community | Groundwater |
| 43 | Forestview Senior Community LLC | Grays Harbor | 92 | Community | Groundwater |
| 44 | Bay City Properties | Grays Harbor | 90 | Community | Groundwater |
| 45 | Screamin Eagle Campground | Grays Harbor | 86 | Transient non-community | Groundwater |
| 46 | Vaughan Pumps | Grays Harbor | 85 | Non-transient non-community | Groundwater |
| 47 | Oceana Ii East | Grays Harbor | 80 | Transient non-community | Groundwater |
| 48 | Murphy Elma Veneer | Grays Harbor | 80 | Non-transient non-community | Groundwater |
| 49 | Paradise Water Assoc | Grays Harbor | 74 | Community | Groundwater |
| 50 | Harbor Mobile Estates | Grays Harbor | 72 | Community | Groundwater |
All other water systems in Grays Harbor County (38)
The remaining active systems filed under Grays Harbor County, largest first, with the population each reports serving.
- Vikings West Mobile Home71
- Satsop School District 10470
- Oceana Ii West66
- Sunrise Resorts Copalis Beach65
- Iron Springs Park62
- Artic Tavern and Rv Park58
- Bradys Oysters58
- Johns River Lodge57
- Ocean Mist Rv Park56
- Sandpiper Beach Resort55
- Lil Prairie Mart52
- Beachwood Resort50
- Pit Water Co 32848
- Quinault47
- Camp Bethel Rustic44
- Rustemeyer Mobile Home Park44
- Ocean City Campground41
- Rls 138
- Tidelands Campgrounds38
- Big Spruce Resort35
- Brady Food Mart30
- Elma Evergreen Village29
- Friends Landing28
- 109 Rv Park & Campground28
- Park 400 Association28
- Copalis Community Church28
- Wind Sand Estates27
- Ocosta Mobile Home Park LLC26
- Value Ford26
- Driftwood Acres26
- Satsop Work Center25
- Copalis Rocks Water21
- Chumbley Family LLC20
- Copalis Rv Park19
- Harlem Ent. LLC17
- Echoes of the Sea14
- Timberline Estates14
- Pacific Dunes Resort7
Grays Harbor County water systems: frequently asked questions
How many public water systems are in Grays Harbor County, Washington?
EPA's SDWIS records file 88 active public water systems under Grays Harbor County, Washington: 35 community systems (40%), 6 non-transient non-community systems (6.8%) and 47 transient non-community systems (53%).
Who supplies drinking water in Grays Harbor County, WA?
The largest community water systems filed under Grays Harbor County are City of Aberdeen (22,867 people served), Hoquiam Water Department (11,456 people served) and Ocean Shores Water Dept (9,347 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 Grays Harbor County's drinking water come from groundwater or surface water?
Of the 88 active public water systems in Grays Harbor County, 97% draw mainly on groundwater and 3.4% on surface water, counting purchased supplies. The largest system, City of Aberdeen, uses surface water.
Where can I find a water quality report for Grays Harbor 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. 35 community systems are filed under Grays Harbor 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 Grays Harbor 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
- All Washington public water systems· 4,705 active
- San Juan County· 112 systems
- Benton County· 108 systems
- Clallam County· 100 systems
- Kittitas County· 96 systems
- Skagit County· 85 systems
- Franklin County· 80 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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 Grays Harbor County, Washington”, https://aquacensus.com/water-systems/washington/grays-harbor (data as of October 1, 2026).