Big Horn County, Wyoming — public water systems
At a glance
28 active public water systems are filed under Big Horn County, Wyoming in EPA's SDWIS records, together reporting 10,387 people served. The largest is Town of Lovell, which reports serving 2,250 people. 15 are community water systems serving people where they live; the other 13 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
28
Population served
10.4K
Community systems
15
Groundwater share
82.1%
How does Big Horn County compare with other Wyoming counties?
Big Horn County has the 9th-most active public water systems among the 33 counties listed for active Wyoming systems in EPA records; among the 23 with 3 or more systems, the median has 27. Its systems report 10,387 people served in total, the 14th-largest county figure in the state and 1.6% of the statewide total. The average system here reports serving 371 people, about 56% below the Wyoming average of 838. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Big Horn County's drinking water come from?
By primary water source, Big Horn County's active systems draw on groundwater (16, 57%), purchased groundwater (7, 25%), purchased surface water (4, 14%) and surface water (1, 3.6%). Overall, 82% rely mainly on groundwater (including purchased groundwater) and 18% on surface water, compared with 83% and 17% across Wyoming. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Town of Lovell, draws primarily on purchased surface water.
What kinds of water systems operate in Big Horn County?
Big Horn County's active systems break down as 15 community systems (54%), 3 non-transient non-community systems (11%) and 10 transient non-community systems (36%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as local government (43%), private (32%), federal government (21%) and state government (3.6%).
Water systems in Big Horn County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Lovell, Town of | Big Horn | 2,250 | Community | Purchased surface water |
| 2 | Greybull, Town of | Big Horn | 2,080 | Community | Groundwater |
| 3 | Basin, Town of | Big Horn | 1,250 | Community | Purchased groundwater |
| 4 | South Big Horn County Jpb | Big Horn | 900 | Community | Groundwater |
| 5 | Cowley, Town of | Big Horn | 800 | Community | Groundwater |
| 6 | Byron, Town of | Big Horn | 561 | Community | Purchased surface water |
| 7 | Antelope Butte Ski Area | Big Horn | 527 | Transient non-community | Surface water |
| 8 | Burlington, Town of | Big Horn | 348 | Community | Purchased groundwater |
| 9 | Deaver Municipal Water System | Big Horn | 176 | Community | Purchased surface water |
| 10 | Frannie, Town of | Big Horn | 160 | Community | Purchased surface water |
| 11 | South End Water Users S&I District | Big Horn | 150 | Community | Purchased groundwater |
| 12 | Shell Town Water Improvement District | Big Horn | 120 | Community | Purchased groundwater |
| 13 | Medicine Lodge St Hist Site | Big Horn | 115 | Transient non-community | Groundwater |
| 14 | Manderson, Town of | Big Horn | 110 | Community | Purchased groundwater |
| 15 | Bhnf-Sitting Bull Cg | Big Horn | 100 | Transient non-community | Groundwater |
| 16 | Bhnf-Boulder Park Cg | Big Horn | 100 | Transient non-community | Groundwater |
| 17 | American Colloid Company | Big Horn | 93 | Non-transient non-community | Groundwater |
| 18 | Georgia-Pacific Gypsum LLC | Big Horn | 90 | Non-transient non-community | Groundwater |
| 19 | Greybull Heights Water Users | Big Horn | 84 | Community | Purchased groundwater |
| 20 | Bentonite Performance Minerals/Lovell | Big Horn | 68 | Non-transient non-community | Groundwater |
| 21 | Hyattville S&I District | Big Horn | 60 | Community | Groundwater |
| 22 | Scharen Subdivision | Big Horn | 50 | Community | Purchased groundwater |
| 23 | Bighorn Canyon Nat'L Rec. Area | Big Horn | 40 | Transient non-community | Groundwater |
| 24 | Bhnf-Ranger Creek Cg | Big Horn | 40 | Transient non-community | Groundwater |
| 25 | Wyoming High Country, LLC | Big Horn | 35 | Transient non-community | Groundwater |
| 26 | Bighorn Nf-Tyrrell Work Center | Big Horn | 30 | Transient non-community | Groundwater |
| 27 | Blm - Five Springs Campground | Big Horn | 25 | Transient non-community | Groundwater |
| 28 | Camp Paintrock | Big Horn | 25 | Transient non-community | Groundwater |
Also serving Big Horn County
These systems serve several counties, including Big Horn County. EPA lists another county first for them, so they are not included in the counts above.
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bighorn Resort LLC | Washakie + 1 more | 154 | Transient non-community | Groundwater |
Big Horn County water systems: frequently asked questions
How many public water systems are in Big Horn County, Wyoming?
EPA's SDWIS records file 28 active public water systems under Big Horn County, Wyoming: 15 community systems (54%), 3 non-transient non-community systems (11%) and 10 transient non-community systems (36%). At least 1 more system is listed under another county but also serve Big Horn County.
Who supplies drinking water in Big Horn County, WY?
The largest community water systems filed under Big Horn County are Town of Lovell (2,250 people served), Town of Greybull (2,080 people served) and Town of Basin (1,250 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Big Horn County's drinking water come from groundwater or surface water?
Of the 28 active public water systems in Big Horn County, 82% draw mainly on groundwater and 18% on surface water, counting purchased supplies. The largest system, Town of Lovell, uses purchased surface water.
Where can I find a water quality report for Big Horn County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 15 community systems are filed under Big Horn County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Big Horn County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Wyoming water systems
- All Wyoming public water systems· 775 active
- Park County· 49 systems
- Natrona County· 48 systems
- Lincoln County· 44 systems
- Sweetwater County· 44 systems
- Platte County· 28 systems
- Sublette County· 27 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Big Horn County, Wyoming”, https://aquacensus.com/water-systems/wyoming/big-horn (data as of October 1, 2026).