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Bannock County, Idaho — public water systems

At a glance

47 active public water systems are filed under Bannock County, Idaho in EPA's SDWIS records, together reporting 82,237 people served. The largest is City of Pocatello, which reports serving 58,231 people. 23 are community water systems serving people where they live; the other 24 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

47

Population served

82.2K

Community systems

23

Groundwater share

100%

How does Bannock County compare with other Idaho counties?

Bannock County has the 15th-most active public water systems among the 64 counties listed for active Idaho systems in EPA records; among the 47 with 3 or more systems, the median has 27. Its systems report 82,237 people served in total, the 5th-largest county figure in the state and 4.7% of the statewide total. The average system here reports serving 1,750 people, about twice the Idaho average of 899. 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 Bannock County's drinking water come from?

By primary water source, Bannock County's active systems draw on groundwater (47, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 96% and 4.1% across Idaho. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Pocatello, draws primarily on groundwater.

What kinds of water systems operate in Bannock County?

Bannock County's active systems break down as 23 community systems (49%), 3 non-transient non-community systems (6.4%) and 21 transient non-community systems (45%). 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 (77%), local government (19%) and federal government (4.3%).

Water systems in Bannock County

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Active public water systems in Bannock County, Idaho
#Water systemCountyPopulation servedTypeSource
1Pocatello City ofBannock58,231CommunityGroundwater
2Chubbuck City ofBannock15,842CommunityGroundwater
3Mccammon City ofBannock800CommunityGroundwater
4Inkom City ofBannock792CommunityGroundwater
5Tyhee Elementary SchoolBannock675Non-transient non-communityGroundwater
6Downey City ofBannock625CommunityGroundwater
7LDS Yellowstone ChurchBannock467Transient non-communityGroundwater
8LDS Tyhee Stake CenterBannock436Transient non-communityGroundwater
9Pebble Creek Ski AreaBannock400Transient non-communityGroundwater
10Lava Hot Springs City ofBannock386CommunityGroundwater
11Arimo City ofBannock368CommunityGroundwater
12Downata Hot SpringsBannock350Transient non-communityGroundwater
13Tyhee and S and N Estates Water AssnBannock300CommunityGroundwater
14Pocatello Koa LLCBannock250Transient non-communityGroundwater
15Laceys Vista Acres Water CorpBannock200CommunityGroundwater
16Caribou AcresBannock150CommunityGroundwater
17D and M Water AssnBannock142CommunityGroundwater
18Whitewater SubdBannock106CommunityGroundwater
19Beech HollowBannock100Transient non-communityGroundwater
20Lava Hot Springs KoaBannock100Transient non-communityGroundwater
21Hitt the RoadBannock100Transient non-communityGroundwater
22Camp TaylorBannock100Transient non-communityGroundwater
23Lost TrailBannock100Transient non-communityGroundwater
24Equestrian EstatesBannock88CommunityGroundwater
25Twin Pines Mobile ParkBannock86CommunityGroundwater
26Wildhorse Ridge SubdBannock85CommunityGroundwater
27Lava CampgroundBannock80Transient non-communityGroundwater
28Portneuf Bend CampgroundBannock76Transient non-communityGroundwater
29LDS Virginia Ward ChurchBannock75Transient non-communityGroundwater
30Valley View EstatesBannock74CommunityGroundwater
31LDS Swan Lake ChurchBannock62Transient non-communityGroundwater
32Smith Road Water Users AssnBannock58CommunityGroundwater
33Mccammon SubwayBannock50Transient non-communityGroundwater
34Intermountain Vipassana AssociationBannock50Transient non-communityGroundwater
35Usfs Mink Creek Group Use AreaBannock50Transient non-communityGroundwater
36Tyhee EnterprisesBannock50Transient non-communityGroundwater
37Baker RanchBannock50Transient non-communityGroundwater
38Thunder Canyon Estates Homeowners AssocBannock35CommunityGroundwater
39Idaho Materials and ConstructionBannock33Non-transient non-communityGroundwater
40Swan Lake Culinary Water CompanyBannock29CommunityGroundwater
41Space Acres Water Users AssnBannock29CommunityGroundwater
42Intermountain Gas CompanyBannock28Non-transient non-communityGroundwater
43Moose MountainBannock27CommunityGroundwater
44Mink Creek Mountain EstatesBannock27CommunityGroundwater
45Evergreen Acres SubdBannock25CommunityGroundwater
46Sunnyside SinclairBannock25Transient non-communityGroundwater
47Usfs Scout Mountain CampgroundBannock25Transient non-communityGroundwater

Bannock County water systems: frequently asked questions

How many public water systems are in Bannock County, Idaho?

EPA's SDWIS records file 47 active public water systems under Bannock County, Idaho: 23 community systems (49%), 3 non-transient non-community systems (6.4%) and 21 transient non-community systems (45%).

Who supplies drinking water in Bannock County, ID?

The largest community water systems filed under Bannock County are City of Pocatello (58,231 people served), City of Chubbuck (15,842 people served) and City of Mccammon (800 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 Bannock County's drinking water come from groundwater or surface water?

Of the 47 active public water systems in Bannock County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Pocatello, uses groundwater.

Where can I find a water quality report for Bannock 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. 23 community systems are filed under Bannock 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 Bannock 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 Idaho 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 Bannock County, Idaho”, https://aquacensus.com/water-systems/idaho/bannock (data as of October 1, 2026).