Yakima County, Washington — public water systems

217 active public water systems serve Yakima County, reporting 266.8K people served.

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

Active systems

217

Population served

266.8K

Community systems

Groundwater share

99.1%

Water systems in Yakima County

Active public water systems in Yakima County, Washington
#	Water system	County	Population served	Type	Source
1	Yakima Water Division City of	Yakima	112,858	Community	Surface water
2	Nob Hill Water Association	Yakima	38,050	Community	Groundwater
3	Sunnyside City of	Yakima	17,194	Community	Groundwater
4	Grandview City of	Yakima	11,010	Community	Groundwater
5	Selah City of	Yakima	9,331	Community	Groundwater
6	Toppenish Water Department	Yakima	8,950	Community	Groundwater
7	Yak Co - Terrace Heights	Yakima	8,410	Community	Groundwater
8	Union Gap Water	Yakima	6,433	Community	Groundwater
9	Moxee Water Department	Yakima	5,599	Community	Groundwater
10	Wapato Waterworks	Yakima	5,255	Community	Groundwater
11	Granger Water Department	Yakima	3,993	Community	Groundwater
12	Zillah City of	Yakima	3,518	Community	Groundwater
13	Naches Town of	Yakima	3,512	Community	Groundwater
14	Mabton City of	Yakima	2,150	Community	Groundwater
15	Tieton Water Dept City of	Yakima	1,475	Community	Groundwater
16	Harrah Water System	Yakima	1,304	Community	Groundwater
17	Harrison Well #2	Yakima	1,200	Non-transient non-community	Groundwater
18	Washington Beef LLC	Yakima	1,025	Non-transient non-community	Groundwater
19	Wiley City Fairgrounds	Yakima	1,000	Transient non-community	Groundwater
20	Selah Cr Sb Rest Area	Yakima	1,000	Transient non-community	Groundwater
21	Allan Bros Warehouse	Yakima	1,000	Non-transient non-community	Groundwater
22	Yak Co - Buena Water System	Yakima	952	Community	Groundwater
23	Highland Quick Stop	Yakima	801	Transient non-community	Groundwater
24	Heritage University Water System	Yakima	750	Non-transient non-community	Groundwater
25	Memorial Bible Church	Yakima	736	Transient non-community	Groundwater
26	Selah Cr Nb Rest Area	Yakima	685	Transient non-community	Groundwater
27	Outlook Elementary School	Yakima	600	Non-transient non-community	Groundwater
28	Highland High School	Yakima	500	Non-transient non-community	Groundwater
29	Pomona View Mobile Park	Yakima	470	Community	Groundwater
30	Marcus Whitman School	Yakima	370	Non-transient non-community	Groundwater
31	Sun Tides Vista Homeowners Assn	Yakima	350	Community	Groundwater
32	Skyline Mobile Home Park	Yakima	340	Community	Groundwater
33	Mcdonald Well	Yakima	307	Transient non-community	Groundwater
34	Selah Hills Homeowners Cooperative	Yakima	300	Community	Groundwater
35	Sunnyview Park	Yakima	300	Transient non-community	Purchased groundwater
36	Outlook Community Water	Yakima	282	Community	Groundwater
37	Marys Garden	Yakima	280	Community	Groundwater
38	Yakima Training Center - Pomona	Yakima	280	Non-transient non-community	Groundwater
39	Panorama Place Water Assn	Yakima	220	Community	Groundwater
40	Mountainview Elementary School	Yakima	220	Non-transient non-community	Groundwater
41	Sundquist Sunnyslope Domestic	Yakima	196	Community	Groundwater
42	Sundquist Twh-Terrace Heights	Yakima	192	Community	Groundwater
43	Yak Co - Crewport	Yakima	192	Community	Groundwater
44	Richardson Water Company	Yakima	188	Community	Groundwater
45	Bonair Winery	Yakima	181	Transient non-community	Groundwater
46	Lombard Loop Water Association	Yakima	180	Community	Groundwater
47	Country Mobile Estates	Yakima	180	Community	Groundwater
48	Cowiche Growers Inc.	Yakima	177	Non-transient non-community	Groundwater
49	Willow Tree Park	Yakima	176	Community	Groundwater
50	Borton & Sons Inc.	Yakima	159	Non-transient non-community	Groundwater