Yellowstone County, Montana — public water systems

118 active public water systems serve Yellowstone County, reporting 169.2K people served.

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

Active systems

118

Population served

169.2K

Community systems

Groundwater share

44.9%

Water systems in Yellowstone County

Active public water systems in Yellowstone County, Montana
#	Water system	County	Population served	Type	Source
1	Billings City of	Yellowstone	114,000	Community	Surface water
2	Billings Heights Co Water Dist of	Yellowstone	12,000	Community	Purchased surface water
3	Laurel Municipal Water System	Yellowstone	6,339	Community	Surface water
4	Lockwood Water and Sewer District	Yellowstone	5,900	Community	Surface water
5	Rocky Mountain College	Yellowstone	5,700	Non-transient non-community	Purchased surface water
6	Montana State University Billings	Yellowstone	2,999	Non-transient non-community	Purchased surface water
7	Pioneer Water Service	Yellowstone	900	Community	Purchased surface water
8	Worden Ballantine Yellowstone	Yellowstone	800	Community	Groundwater under influence of surface water
9	Shepherd Schools	Yellowstone	800	Non-transient non-community	Groundwater
10	Meadowlark of Billings LLC	Yellowstone	800	Community	Groundwater
11	Golden Meadows Subdivision	Yellowstone	772	Community	Purchased surface water
12	Fisher Water Service	Yellowstone	750	Community	Purchased surface water
13	Hillside Village	Yellowstone	650	Community	Purchased surface water
14	Cherry Creek Estates LLC	Yellowstone	600	Community	Purchased surface water
15	Elder Grove Middle School Bldg 6	Yellowstone	600	Non-transient non-community	Purchased surface water
16	Travel Centers of America Truck Plaza	Yellowstone	600	Transient non-community	Groundwater
17	Windsor Estates	Yellowstone	530	Community	Purchased surface water
18	Pryor Creek Water Assn	Yellowstone	475	Community	Groundwater
19	Elder Grove School Buildings 1 & 2	Yellowstone	420	Non-transient non-community	Purchased surface water
20	Custer Rest Area Eastbound	Yellowstone	400	Transient non-community	Groundwater
21	Custer Rest Area Westbound	Yellowstone	400	Transient non-community	Groundwater
22	Stone Creek Subdivision	Yellowstone	378	Community	Groundwater
23	Sundance Subdivision	Yellowstone	378	Community	Groundwater
24	Hidden Lake Yellowstone County W and S D	Yellowstone	350	Community	Groundwater
25	Zoomontana Inc.	Yellowstone	324	Transient non-community	Groundwater
26	Emerald View Park	Yellowstone	320	Community	Purchased surface water
27	Shiloh Road Development	Yellowstone	315	Community	Purchased surface water
28	Shepherd Dollar General Water System	Yellowstone	303	Transient non-community	Groundwater
29	Northwest Water Conditioning Culligan W	Yellowstone	300	Non-transient non-community	Purchased surface water
30	Town and Country Dba Market Basket	Yellowstone	300	Transient non-community	Groundwater
31	Peter Yegen Jr Golf Club	Yellowstone	300	Transient non-community	Groundwater
32	Camelot Ranch Event Center	Yellowstone	300	Transient non-community	Purchased surface water
33	Pictograph Cave State Park	Yellowstone	250	Transient non-community	Purchased surface water
34	Granite Park Water Association	Yellowstone	250	Community	Groundwater
35	Precision Water	Yellowstone	250	Community	Purchased surface water
36	New Life Church	Yellowstone	250	Transient non-community	Purchased surface water
37	Golden Meadows Subdivision 2nd Cc	Yellowstone	245	Community	Purchased surface water
38	Wells Garden Estates	Yellowstone	240	Community	Groundwater
39	Yellowstone Boys and Girls Ranch	Yellowstone	240	Community	Groundwater
40	Skycrest Estates Subdivision	Yellowstone	235	Community	Groundwater
41	Huntley Yellowstone Co Water and Sewer	Yellowstone	230	Community	Groundwater
42	Crystal Springs Water System	Yellowstone	225	Community	Groundwater
43	The Nines Subdivision	Yellowstone	220	Community	Groundwater
44	Western Ranch Supply	Yellowstone	215	Transient non-community	Groundwater
45	Eagle Rock Golf Course	Yellowstone	200	Transient non-community	Purchased surface water
46	Broadview Town of	Yellowstone	200	Community	Groundwater
47	Yellowstone Drag Strip	Yellowstone	200	Transient non-community	Purchased surface water
48	Oak Ridge Estates	Yellowstone	200	Community	Groundwater
49	Canyon Creek School District 4	Yellowstone	200	Non-transient non-community	Groundwater
50	Elder Grove School Building Five	Yellowstone	200	Non-transient non-community	Purchased surface water