Okanogan County, Washington — public water systems

119 active public water systems serve Okanogan County, reporting 44K people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

119

Population served

44K

Community systems

Groundwater share

98.3%

Water systems in Okanogan County

Active public water systems in Okanogan County, Washington
#	Water system	County	Population served	Type	Source
1	Omak City of	Okanogan	4,940	Community	Groundwater
2	Oroville City of	Okanogan	3,256	Community	Groundwater
3	Brewster City of	Okanogan	3,235	Community	Groundwater
4	Okanogan Water Department City of	Okanogan	2,921	Community	Groundwater
5	Tonasket Water System	Okanogan	2,392	Community	Groundwater
6	Pearrygin Lake State Park - Both Cg	Okanogan	2,103	Transient non-community	Groundwater
7	Okanogan Neighbors	Okanogan	1,600	Transient non-community	Groundwater
8	Coulee Dam Water Dept	Okanogan	1,454	Community	Surface water
9	Winthrop Town of	Okanogan	1,350	Community	Groundwater
10	Monse-Riggan Camp	Okanogan	1,165	Community	Groundwater
11	Pateros Water Department	Okanogan	1,149	Community	Groundwater
12	Alta Lake State Park	Okanogan	1,071	Transient non-community	Groundwater
13	Twisp Town of	Okanogan	1,055	Community	Groundwater
14	Conconully State Park	Okanogan	1,004	Transient non-community	Groundwater
15	Johns Farms	Okanogan	872	Transient non-community	Groundwater
16	Okanogan County Fair Water System	Okanogan	867	Transient non-community	Groundwater
17	Liberty Bell High School	Okanogan	642	Non-transient non-community	Groundwater
18	Jaw Farms Inc.	Okanogan	636	Community	Groundwater
19	Duck Lake Water Association	Okanogan	635	Community	Groundwater
20	Brewster Flat Domestic Water Assn	Okanogan	542	Community	Groundwater
21	Nespelem Water Dept	Okanogan	510	Community	Groundwater
22	P and G Orchards Camp 2	Okanogan	489	Community	Groundwater
23	Bridgeport State Park	Okanogan	441	Transient non-community	Groundwater
24	Riverside Town of	Okanogan	429	Community	Groundwater
25	Washington Pass Well - Methow Rd	Okanogan	413	Transient non-community	Groundwater
26	Sun Mountain Resort	Okanogan	376	Non-transient non-community	Surface water
27	Elmer City Water System	Okanogan	368	Community	Groundwater
28	Loup Loup Ski Area	Okanogan	350	Transient non-community	Groundwater
29	Progressive Flat Water Assn	Okanogan	335	Community	Purchased groundwater
30	Conconully City Well	Okanogan	299	Transient non-community	Groundwater
31	Sandflat Water Association	Okanogan	260	Community	Groundwater
32	Suncrest Plat Water System	Okanogan	260	Community	Groundwater
33	Conconully Sp Boat Launch	Okanogan	258	Transient non-community	Groundwater
34	Coleman Butte Water Assn	Okanogan	250	Community	Groundwater
35	Loomis Water Users Assn Inc.	Okanogan	225	Community	Groundwater
36	Riverbend Rv Park	Okanogan	222	Transient non-community	Groundwater
37	Los Reyes Inc.	Okanogan	200	Transient non-community	Groundwater
38	Honeybear Growers	Okanogan	161	Non-transient non-community	Groundwater
39	Alta Lake Golf Course Plat	Okanogan	161	Community	Groundwater
40	Emerald City Green Machine	Okanogan	155	Transient non-community	Groundwater
41	Country River Farm	Okanogan	153	Transient non-community	Groundwater
42	P and G Orchards Camp 3	Okanogan	152	Transient non-community	Groundwater
43	River Road Mobile Home Park	Okanogan	150	Community	Groundwater
44	Klipchuck Cg - Methow Rd	Okanogan	149	Transient non-community	Groundwater
45	Aston Estates	Okanogan	141	Community	Groundwater
46	Arrowhead Ranch	Okanogan	140	Non-transient non-community	Groundwater
47	Conconully Sp Primitive Area	Okanogan	129	Transient non-community	Groundwater
48	Pasayten Peak	Okanogan	129	Transient non-community	Groundwater
49	Tonasket Free Methodist Church	Okanogan	120	Transient non-community	Groundwater
50	Crumbacher Estates Water System	Okanogan	111	Community	Groundwater