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Campbell County, Wyoming — public water systems

At a glance

68 active public water systems are filed under Campbell County, Wyoming in EPA's SDWIS records, together reporting 52,981 people served. The largest is City of Gillette, which reports serving 32,222 people. 45 are community water systems serving people where they live; the other 23 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

68

Population served

53K

Community systems

45

Groundwater share

100%

How does Campbell County compare with other Wyoming counties?

Campbell County has the 2nd-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 52,981 people served in total, the 5th-largest county figure in the state and 8.2% of the statewide total. The average system here reports serving 779 people, roughly in line with 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 Campbell County's drinking water come from?

By primary water source, Campbell County's active systems draw on groundwater (59, 87%) and purchased groundwater (9, 13%). 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, City of Gillette, draws primarily on groundwater.

What kinds of water systems operate in Campbell County?

Campbell County's active systems break down as 45 community systems (66%), 21 non-transient non-community systems (31%) and 2 transient non-community systems (2.9%). 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 (75%), local government (24%) and state government (1.5%).

The 50 largest water systems in Campbell County

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Active public water systems in Campbell County, Wyoming
#Water systemCountyPopulation servedTypeSource
1Gillette, City ofCampbell32,222CommunityGroundwater
2Wright Water & Sewer DistrictCampbell3,207CommunityGroundwater
3Sleepy Hollow SubdivisionCampbell2,400CommunityGroundwater
4Antelope Valley I&S District (Avisd)Campbell1,280CommunityGroundwater
5Fox Park SubdivisionCampbell843CommunityGroundwater
6Heritage Village SubdivisionCampbell750CommunityGroundwater
7Foothills Mobile Home ParkCampbell735CommunityPurchased groundwater
8Eastview Manufactured Home CommunityCampbell688CommunityPurchased groundwater
9Black Thunder East, LLC AdminCampbell650Non-transient non-communityGroundwater
10Black Thunder Coal MineCampbell600Non-transient non-communityGroundwater
11Navajo Trans Enrg. Co., LLC (Cordero)Campbell550Non-transient non-communityGroundwater
12Crestview Estates SubdivisionCampbell500CommunityGroundwater
13Westview MhcCampbell416CommunityPurchased groundwater
14Means Improvement & Service DistrictCampbell410CommunityGroundwater
15Nickelson Farms Water CompanyCampbell400CommunityGroundwater
16Freedom Hills SubdivisionCampbell400CommunityGroundwater
17Countryside Water Users, Inc..Campbell360CommunityGroundwater
18Rochelle Coal MineCampbell306Non-transient non-communityGroundwater
19Highview Mfg Mobile Home Community (Mhc)Campbell304CommunityPurchased groundwater
20Eagle Specialty Materials, LLC-Belle AyrCampbell300Non-transient non-communityGroundwater
21Eagle Special. Mats, LLC-Rawhide SchoolCampbell295Non-transient non-communityGroundwater
22Cook Road Water DistrictCampbell291CommunityGroundwater
23Eagle Spec. Mat., LLC-Eagle Butte MineCampbell277Non-transient non-communityGroundwater
24Cedar Hills Water AssociationCampbell258CommunityGroundwater
25Wrangler EstatesCampbell250CommunityGroundwater
26Powder River Coal-Rawhide MineCampbell235Non-transient non-communityGroundwater
27American Road W&S DistrictCampbell220CommunityGroundwater
28Powder River Coal-Caballo MineCampbell200Non-transient non-communityGroundwater
29Stone Gate EstatesCampbell198CommunityGroundwater
30Force Road Joint Powers BoardCampbell195CommunityGroundwater
31People`S Improvement & Service DistrictCampbell176CommunityGroundwater
32Lex Mobile Home ParkCampbell172CommunityPurchased groundwater
33North Antelope Coal MineCampbell170Non-transient non-communityGroundwater
34Black Hills Power IncorporatedCampbell154Non-transient non-communityGroundwater
35Southfork EstatesCampbell144CommunityGroundwater
36Bennor Estates & Improvement DistrictCampbell144CommunityPurchased groundwater
37Eagle Ridge MHP, LLCCampbell140CommunityGroundwater
38Green Valley Estates I&S DistrictCampbell140CommunityGroundwater
39North Gurley Mobile Home ParkCampbell128CommunityPurchased groundwater
40Eight Mile SubdivisionCampbell120CommunityGroundwater
41Section 4 Water System IncorporatedCampbell120CommunityGroundwater
42Coal Creek Mine-Thunder Basin Coal CoCampbell105Non-transient non-communityGroundwater
43Hoy Mobile Home ParkCampbell100CommunityGroundwater
44Play Park LLCCampbell96CommunityGroundwater
45Rozet Ranchettes I&S DistrictCampbell85CommunityGroundwater
46Buckskin Mining Company-Kiewit CorpCampbell80Non-transient non-communityGroundwater
47Ward Creek Landowners AssociationCampbell77CommunityGroundwater
48Dry Fork StationCampbell75Non-transient non-communityGroundwater
49Pineview I&S DistrictCampbell75CommunityGroundwater
50School Creek MineCampbell75Non-transient non-communityGroundwater

All other water systems in Campbell County (18)

The remaining active systems filed under Campbell County, largest first, with the population each reports serving.

Campbell County water systems: frequently asked questions

How many public water systems are in Campbell County, Wyoming?

EPA's SDWIS records file 68 active public water systems under Campbell County, Wyoming: 45 community systems (66%), 21 non-transient non-community systems (31%) and 2 transient non-community systems (2.9%).

Who supplies drinking water in Campbell County, WY?

The largest community water systems filed under Campbell County are City of Gillette (32,222 people served), Wright Water & Sewer District (3,207 people served) and Sleepy Hollow Subdivision (2,400 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 Campbell County's drinking water come from groundwater or surface water?

Of the 68 active public water systems in Campbell County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Gillette, uses groundwater.

Where can I find a water quality report for Campbell 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. 45 community systems are filed under Campbell 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 Campbell 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

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 Campbell County, Wyoming”, https://aquacensus.com/water-systems/wyoming/campbell (data as of October 1, 2026).