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Park County, Wyoming — public water systems

At a glance

49 active public water systems are filed under Park County, Wyoming in EPA's SDWIS records, together reporting 38,068 people served. The largest is City of Cody, which reports serving 10,224 people. 11 are community water systems serving people where they live; the other 38 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

49

Population served

38.1K

Community systems

11

Groundwater share

77.6%

How does Park County compare with other Wyoming counties?

Park County has the 5th-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 38,068 people served in total, the 7th-largest county figure in the state and 5.9% of the statewide total. The average system here reports serving 777 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 Park County's drinking water come from?

By primary water source, Park County's active systems draw on groundwater (33, 67%), purchased surface water (7, 14%), groundwater under influence of surface water (5, 10%) and surface water (4, 8.2%). Overall, 78% rely mainly on groundwater (including purchased groundwater) and 22% 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 Cody, draws primarily on purchased surface water.

What kinds of water systems operate in Park County?

Park County's active systems break down as 11 community systems (22%), 2 non-transient non-community systems (4.1%) and 36 transient non-community systems (73%). 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 (55%), federal government (29%), local government (8.2%) and state government (6.1%).

Water systems in Park County

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Active public water systems in Park County, Wyoming
#Water systemCountyPopulation servedTypeSource
1Cody, City ofPark10,224CommunityPurchased surface water
2Northwest Rural Water DistrictPark7,330CommunityPurchased surface water
3Powell, City ofPark6,310CommunityPurchased surface water
4Ynp-Canyon VillagePark4,300Non-transient non-communitySurface water
5Ynp-Mammoth Hot SpringsPark2,600CommunitySurface water
6Ynp-NorrisPark + 1 more1,515Transient non-communitySurface water
7K Bar Z Guest RanchPark847Transient non-communityGroundwater
8Buffalo Bill Dam Visitor CenterPark500Transient non-communityPurchased surface water
9Ynp-Tower Fall CgPark495Transient non-communityGroundwater
10Green Acres Mobile Home ParkPark375CommunityPurchased surface water
11Meeteetse, Town ofPark327CommunityGroundwater under influence of surface water
12Jubys Mobile Home ParkPark300CommunityPurchased surface water
13Camp Buffalo BillPark250Transient non-communityGroundwater
14Ynp-Indian CreekPark240Transient non-communityGroundwater
15Yellowstone Valley InnPark237Transient non-communityGroundwater
16Pahaska Tepee ResortPark205Transient non-communityGroundwater under influence of surface water
17Shoshone Nf-Wapiti Cg & RsPark157Transient non-communityGroundwater
18Shoshone Nf-Three Mile CgPark150Transient non-communityGroundwater
19Shoshone Nf-Fox Creek CgPark120Transient non-communityGroundwater
20Sleeping Giant Ski AreaPark112Transient non-communityGroundwater
21Big Horn Basin Boat ClubPark104Transient non-communityGroundwater
22Rivers Bend Trailer CourtPark96CommunityPurchased surface water
23Ynp-Slough Creek CgPark94Transient non-communityGroundwater
24Shoshone Nf-Beartooth Lake CgPark80Transient non-communityGroundwater
25Buffalo Bill Sp-Lake Shore CampgroundPark77Transient non-communityGroundwater
26Shoshone Nf-Island Lake CgPark75Transient non-communityGroundwater
27Absaroka Mountain LodgePark67Transient non-communityGroundwater
287d RanchPark61Transient non-communityGroundwater
29Shoshone LodgePark60Transient non-communityGroundwater
30Contango Resources, LLC- Clark ForkPark60Non-transient non-communityGroundwater under influence of surface water
31Bill Cody RanchPark60Transient non-communityGroundwater
32Buffalo Bill St Pk North ForkPark50Transient non-communityGroundwater
33Green Creek Inn & RvPark50Transient non-communityGroundwater
34Shoshone Nf-Eagle Creek CgPark50Transient non-communityGroundwater
35EdelweissPark42Transient non-communityGroundwater
36Copperleaf Water SystemPark42CommunityGroundwater
37Elephant Head LodgePark41Transient non-communityGroundwater
38Trail ShopPark40Transient non-communityGroundwater
39Shoshone Nf-Rex Hale CgPark40Transient non-communityGroundwater
40Rimrock RanchPark40Transient non-communityGroundwater
41Big Valley & Crossed Arrows Imp DistPark35CommunityGroundwater
42Uxu Ranch LLCPark35Transient non-communityGroundwater under influence of surface water
43Creekside LodgePark32Transient non-communityGroundwater
44Blackwater Creek RanchPark32Transient non-communityGroundwater
45Homestead Campground Water SystemPark28Transient non-communityGroundwater
46Shoshone Nf-Newton Creek #12 CgPark25Transient non-communityGroundwater
47Crossed Sabres Guest RanchPark25Transient non-communityGroundwater under influence of surface water
48Shoshone Municipal PipelinePark25CommunitySurface water
49Painter Estates HoaPark8Transient non-communityGroundwater

Park County water systems: frequently asked questions

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

EPA's SDWIS records file 49 active public water systems under Park County, Wyoming: 11 community systems (22%), 2 non-transient non-community systems (4.1%) and 36 transient non-community systems (73%).

Who supplies drinking water in Park County, WY?

The largest community water systems filed under Park County are City of Cody (10,224 people served), Northwest Rural Water District (7,330 people served) and City of Powell (6,310 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 Park County's drinking water come from groundwater or surface water?

Of the 49 active public water systems in Park County, 78% draw mainly on groundwater and 22% on surface water, counting purchased supplies. The largest system, City of Cody, uses purchased surface water.

Where can I find a water quality report for Park 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. 11 community systems are filed under Park 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 Park 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 Park County, Wyoming”, https://aquacensus.com/water-systems/wyoming/park (data as of October 1, 2026).