Crook County, Wyoming — public water systems
At a glance
27 active public water systems are filed under Crook County, Wyoming in EPA's SDWIS records, together reporting 8,854 people served. The largest is Devils Tower National Monument, which reports serving 3,071 people. 7 are community water systems serving people where they live; the other 20 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
27
Population served
8.9K
Community systems
7
Groundwater share
100%
How does Crook County compare with other Wyoming counties?
Crook County has the 12th-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 8,854 people served in total, the 17th-largest county figure in the state and 1.4% of the statewide total. The average system here reports serving 328 people, about 61% 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 Crook County's drinking water come from?
By primary water source, Crook County's active systems draw on groundwater (25, 93%), purchased groundwater (1, 3.7%) and groundwater under influence of surface water (1, 3.7%). Overall, all rely mainly on groundwater (including purchased groundwater) and none 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, Devils Tower National Monument, draws primarily on groundwater.
What kinds of water systems operate in Crook County?
Crook County's active systems break down as 7 community systems (26%), 4 non-transient non-community systems (15%) and 16 transient non-community systems (59%). 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 private (59%), local government (19%), state government (11%) and federal government (7.4%).
Water systems in Crook County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Devils Tower National Monument | Crook | 3,071 | Transient non-community | Groundwater |
| 2 | Sundance, City of | Crook | 1,279 | Community | Groundwater |
| 3 | Moorcroft, Town of | Crook | 1,009 | Community | Groundwater |
| 4 | Devils Tower Koa-Campstool | Crook | 516 | Transient non-community | Groundwater |
| 5 | Pine Haven, Town of | Crook | 498 | Community | Groundwater |
| 6 | Hulett, Town of | Crook | 420 | Community | Groundwater |
| 7 | State Line Station | Crook | 305 | Transient non-community | Groundwater |
| 8 | Devil'S Tower Trading Post | Crook | 215 | Transient non-community | Groundwater |
| 9 | Bentonite Performance Minerals - Colony | Crook | 180 | Non-transient non-community | Groundwater |
| 10 | Black Hills Nf-Cook Lake Cg | Crook | 165 | Transient non-community | Groundwater |
| 11 | Vista West Improvement & Serv District | Crook | 120 | Community | Groundwater |
| 12 | Sand Creek Trading Post | Crook | 110 | Transient non-community | Groundwater |
| 13 | Keyhole St Park Headquarters | Crook | 100 | Transient non-community | Groundwater |
| 14 | Keyhole St Park Cottonwood Cg | Crook | 100 | Transient non-community | Groundwater |
| 15 | Beulah Campground | Crook | 99 | Transient non-community | Groundwater |
| 16 | Devils Tower Forest Products | Crook | 90 | Non-transient non-community | Groundwater |
| 17 | Vore Buffalo Jump Foundation | Crook | 85 | Transient non-community | Groundwater |
| 18 | Wy Trans Dept Aladdin Welcome Ctr | Crook | 75 | Transient non-community | Groundwater |
| 19 | Aladdin, Town of | Crook | 62 | Transient non-community | Groundwater |
| 20 | American Colloid-Colony West | Crook | 60 | Non-transient non-community | Groundwater |
| 21 | Keyhole Resort/Marina | Crook | 50 | Transient non-community | Purchased groundwater |
| 22 | Beulah Land Water | Crook | 50 | Community | Groundwater |
| 23 | American Colloid-Colony East | Crook | 45 | Non-transient non-community | Groundwater |
| 24 | Devils Tower View | Crook | 43 | Transient non-community | Groundwater |
| 25 | Ranch A | Crook | 40 | Transient non-community | Groundwater under influence of surface water |
| 26 | Devils Tower Gulch | Crook | 34 | Transient non-community | Groundwater |
| 27 | Buckmiller Enterprises, LLC | Crook | 33 | Community | Groundwater |
Crook County water systems: frequently asked questions
How many public water systems are in Crook County, Wyoming?
EPA's SDWIS records file 27 active public water systems under Crook County, Wyoming: 7 community systems (26%), 4 non-transient non-community systems (15%) and 16 transient non-community systems (59%).
Who supplies drinking water in Crook County, WY?
The largest community water systems filed under Crook County are City of Sundance (1,279 people served), Town of Moorcroft (1,009 people served) and Town of Pine Haven (498 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 Crook County's drinking water come from groundwater or surface water?
Of the 27 active public water systems in Crook County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Devils Tower National Monument, uses groundwater.
Where can I find a water quality report for Crook 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. 7 community systems are filed under Crook 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 Crook 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
- Sweetwater County· 44 systems
- Big Horn County· 28 systems
- Platte County· 28 systems
- Sublette County· 27 systems
- Carbon County· 25 systems
- Albany County· 25 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 Crook County, Wyoming”, https://aquacensus.com/water-systems/wyoming/crook (data as of October 1, 2026).