Thurston County, Washington — public water systems

322 active public water systems serve Thurston County, reporting 396.5K people served.

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

Active systems

322

Population served

396.5K

Community systems

196

Groundwater share

99.7%

Water systems in Thurston County

Active public water systems in Thurston County, Washington
#	Water system	County	Population served	Type	Source
1	Olympia City of	Thurston	126,966	Community	Groundwater
2	Lacey Water Department	Thurston	105,178	Community	Groundwater
3	Tumwater City of	Thurston	51,802	Community	Groundwater
4	Yelm City of	Thurston	16,733	Community	Groundwater
5	Tanglewilde Thompson Place 600	Thurston	7,900	Community	Groundwater
6	Pattison 500	Thurston	4,643	Community	Groundwater
7	Grand Mound	Thurston	3,764	Community	Groundwater
8	Millersylvania State Park	Thurston	3,456	Transient non-community	Groundwater
9	Tenino City of	Thurston	3,336	Community	Groundwater
10	Maytown Rest Area	Thurston	3,134	Transient non-community	Groundwater
11	Meadows 690	Thurston	3,100	Community	Groundwater
12	Clearwood	Thurston	2,956	Community	Groundwater
13	Rainier Water Department	Thurston	2,758	Community	Groundwater
14	Nisqually Pines Community Club	Thurston	2,037	Community	Groundwater
15	Scatter Creek Rest Area	Thurston	1,858	Transient non-community	Groundwater
16	Rochester	Thurston	1,762	Community	Groundwater
17	Scott Lake	Thurston	1,604	Community	Groundwater
18	Evergreen Shores	Thurston	1,329	Community	Groundwater
19	Rochester High School	Thurston	1,275	Non-transient non-community	Groundwater
20	Carlyon Beach Homeowners	Thurston	1,273	Community	Groundwater
21	Boston Harbor	Thurston	1,153	Community	Groundwater
22	Schilter Family Farm Store	Thurston	1,056	Transient non-community	Groundwater
23	Holiday Ranchettes	Thurston	1,050	Community	Groundwater
24	Nisqually Commercial Park	Thurston	940	Non-transient non-community	Groundwater
25	Sunwood Lakes Homeowners Assoc Inc.	Thurston	925	Community	Groundwater
26	Lake Lawrence	Thurston	914	Community	Groundwater
27	Scenic Shores Water Company	Thurston	761	Community	Groundwater
28	Tolmie State Park	Thurston	683	Transient non-community	Groundwater
29	Griffin School	Thurston	672	Non-transient non-community	Groundwater
30	South Sound Speedway	Thurston	654	Transient non-community	Groundwater
31	Cedar Creek Corrections Center	Thurston	639	Community	Groundwater
32	South Bay Elementary School	Thurston	615	Non-transient non-community	Groundwater
33	East Olympia Elementary School	Thurston	593	Non-transient non-community	Groundwater
34	Bucoda Water Dept	Thurston	579	Community	Groundwater
35	Southworth Elementary	Thurston	550	Non-transient non-community	Groundwater
36	Foxhall	Thurston	549	Community	Groundwater
37	Zebras Aqueous Substance	Thurston	526	Non-transient non-community	Groundwater
38	Rolling Firs Evergreen Terrace	Thurston	514	Community	Groundwater
39	Silver Hawk	Thurston	499	Community	Groundwater
40	Countrywood Estates 680	Thurston	488	Community	Groundwater
41	Classic Heights	Thurston	480	Community	Groundwater
42	Black Lake Bible Camp & Conf Ctr	Thurston	477	Community	Groundwater
43	Spar Restaurant	Thurston	474	Transient non-community	Groundwater
44	Littlerock Elementary	Thurston	463	Non-transient non-community	Groundwater
45	Maple Lane Behavioral Health	Thurston	450	Community	Groundwater
46	Villa Grove	Thurston	442	Transient non-community	Groundwater
47	Hawley Hills 686	Thurston	425	Community	Groundwater
48	Henderson Boulevard	Thurston	418	Community	Groundwater
49	Delphi	Thurston	381	Community	Groundwater
50	Alpine Hills	Thurston	363	Community	Groundwater