Pennington County, South Dakota — public water systems

156 active public water systems serve Pennington County, reporting 140.1K people served.

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

Active systems

156

Population served

140.1K

Community systems

Groundwater share

98.1%

Water systems in Pennington County

Active public water systems in Pennington County, South Dakota
#	Water system	County	Population served	Type	Source
1	Rapid City	Pennington	72,009	Community	Surface water
2	Box Elder	Pennington	14,000	Community	Groundwater
3	Rapid Valley Sanitary District	Pennington	11,408	Community	Surface water
4	Ellsworth Afb	Pennington	9,100	Community	Purchased surface water
5	Nps-Mount Rushmore National Memorial	Pennington	4,100	Non-transient non-community	Groundwater
6	Colonial Pine Hills Sanitary Distric	Pennington	1,200	Community	Groundwater
7	Chapel Lane Water Company	Pennington	1,200	Community	Groundwater
8	Wr/Lj - Creighton Project	Pennington	1,170	Community	Groundwater
9	Reptile Gardens Inc.	Pennington	1,169	Transient non-community	Groundwater
10	Bear Country USA	Pennington	1,021	Transient non-community	Groundwater
11	Country Store at Three Forks	Pennington	1,000	Transient non-community	Groundwater
12	Addie Camp Water and Septic	Pennington	900	Transient non-community	Groundwater
13	Hill City	Pennington	872	Community	Groundwater
14	Palmer Gulch Lodge/Mt Rushmore Koa	Pennington	850	Transient non-community	Groundwater
15	Powder House Lodge	Pennington	700	Transient non-community	Groundwater
16	Wall	Pennington	699	Community	Groundwater
17	New Underwood	Pennington	679	Community	Groundwater
18	Cosmos Mystery Area	Pennington	600	Transient non-community	Groundwater
19	Usfs-Bhnf Pactola Visitor Center	Pennington	535	Transient non-community	Groundwater
20	Pactola Pines Store	Pennington	500	Transient non-community	Groundwater
21	Dinosaur Museum	Pennington	500	Transient non-community	Groundwater
22	Hisega Meadows Water Inc.	Pennington	491	Community	Groundwater under influence of surface water
23	Rapid City South Rv Park	Pennington	440	Transient non-community	Groundwater
24	Hart Ranch	Pennington	438	Community	Groundwater
25	Pine Grove	Pennington	425	Community	Groundwater
26	South Canyon Country Estates	Pennington	420	Community	Groundwater
27	The Ranch at Black Gap	Pennington	375	Community	Groundwater
28	Rafter-J Bar Ranch	Pennington	374	Transient non-community	Groundwater
29	Prairie Acres LLC	Pennington	350	Community	Groundwater
30	Keystone	Pennington	349	Community	Groundwater
31	Mountain Meadow Resort	Pennington	330	Transient non-community	Groundwater
32	Valley Heights Estates Inc.	Pennington	320	Community	Purchased groundwater
33	Rushmore Mountain Coaster	Pennington	300	Transient non-community	Groundwater
34	Rush Mountain Adventure Park	Pennington	300	Transient non-community	Groundwater
35	The Gaslight	Pennington	300	Transient non-community	Groundwater
36	Prairie Acres North	Pennington	288	Community	Groundwater
37	Carriage Hills	Pennington	267	Community	Groundwater
38	Happy Holiday Rv Resort	Pennington	264	Community	Groundwater
39	Sunset Ranch	Pennington	263	Community	Groundwater
40	Medicine Mountain Scout Camp	Pennington	250	Transient non-community	Groundwater
41	Ymca of the Black Hills	Pennington	250	Transient non-community	Groundwater
42	Rapid City Rv Park and Cg	Pennington	236	Transient non-community	Groundwater
43	Sunnyside Mobile Home Park Ii	Pennington	235	Community	Groundwater
44	Creekside LLC	Pennington	235	Transient non-community	Groundwater
45	Blue Wing Recreation Area	Pennington	200	Transient non-community	Groundwater
46	Rushmore Tramway Adventures	Pennington	200	Transient non-community	Groundwater
47	Chapel in the Hills	Pennington	200	Transient non-community	Groundwater
48	Pine Cliff Estates	Pennington	180	Community	Groundwater
49	Oaks Water Users Association	Pennington	180	Community	Groundwater
50	Htr Black Hills Resorts	Pennington	180	Transient non-community	Groundwater