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Bonneville County, Idaho — public water systems

At a glance

126 active public water systems are filed under Bonneville County, Idaho in EPA's SDWIS records, together reporting 137,194 people served. The largest is City of Idaho Falls, which reports serving 69,450 people. 32 are community water systems serving people where they live; the other 94 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

126

Population served

137.2K

Community systems

32

Groundwater share

100%

How does Bonneville County compare with other Idaho counties?

Bonneville County has the 4th-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 137,194 people served in total, the 4th-largest county figure in the state and 7.8% of the statewide total. The average system here reports serving 1,089 people, about 21% above 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 Bonneville County's drinking water come from?

By primary water source, Bonneville County's active systems draw on groundwater (126, 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 Idaho Falls, draws primarily on groundwater.

What kinds of water systems operate in Bonneville County?

Bonneville County's active systems break down as 32 community systems (25%), 32 non-transient non-community systems (25%) and 62 transient non-community systems (49%). 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 (79%), local government (13%), federal government (7.1%) and state government (0.8%).

The 50 largest water systems in Bonneville County

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Active public water systems in Bonneville County, Idaho
#Water systemCountyPopulation servedTypeSource
1Idaho Falls City ofBonneville69,450CommunityGroundwater
2Falls Water Company Inc.Bonneville22,650CommunityGroundwater
3Ammon City ofBonneville17,338CommunityGroundwater
4Iona Water DeptBonneville2,717CommunityGroundwater
5Comore LomaBonneville1,500CommunityGroundwater
6Melaleuca Warehouse FacilityBonneville1,397Non-transient non-communityGroundwater
7Bonneville High SchoolBonneville1,354Non-transient non-communityGroundwater
8Ucon City ofBonneville1,161CommunityGroundwater
9Sandy Downs Rodeo Grounds and Race TrackBonneville1,000Transient non-communityGroundwater
10LDS Church - Central AveBonneville851Transient non-communityGroundwater
11Rocky Mountain Middle SchoolBonneville813Non-transient non-communityGroundwater
12LDS Ucon Stake House-5144612Bonneville685Transient non-communityGroundwater
133d Water AssociationBonneville680CommunityGroundwater
14Taylor Mountain Water and Sewer DistrictBonneville600CommunityGroundwater
15LDS Church Osgood BldgBonneville582Transient non-communityGroundwater
16LDS Church - Shadow MtnBonneville581Transient non-communityGroundwater
17Noise Park Idaho FallsBonneville500Transient non-communityGroundwater
18Christ Community ChurchBonneville500Transient non-communityGroundwater
19LDS Church Charlotte BldgBonneville497Transient non-communityGroundwater
20American Heritage Charter SchoolBonneville490Non-transient non-communityGroundwater
21LDS Church St Leon Bldg-5278333Bonneville475Transient non-communityGroundwater
22LDS 5th West MeetinghouseBonneville471Transient non-communityGroundwater
23LDS Church Coltman Bldg-5047005Bonneville442Transient non-communityGroundwater
24LDS Milo 1st and 2nd Ward -5069327Bonneville413Transient non-communityGroundwater
25J and K Water CorpBonneville370CommunityGroundwater
26Fairview NorthBonneville350Non-transient non-communityGroundwater
27Bsa Little Lemhi Scout CampBonneville300Transient non-communityGroundwater
28LDS Bonneville High School Sem-5164362Bonneville300Transient non-communityGroundwater
29Yellowstone ChevronBonneville300Transient non-communityGroundwater
30Frazier Industrial CompanyBonneville300Non-transient non-communityGroundwater
31Usfs Calamity CampgroundBonneville300Transient non-communityGroundwater
32Blackhawk Estates/Iron RimBonneville270CommunityGroundwater
33LDS Church Palisades -5069335Bonneville251Transient non-communityGroundwater
34Usfs Falls Campground and Group AreaBonneville250Transient non-communityGroundwater
35Country Life EstatesBonneville250CommunityGroundwater
36Riverbend MeatsBonneville242Non-transient non-communityGroundwater
37Riverside Park CampgroundBonneville200Transient non-communityGroundwater
38Blm Byington Recreation SiteBonneville200Transient non-communityGroundwater
39Gem Lake Water SystemBonneville200Non-transient non-communityGroundwater
40Blm Conant Boat AccessBonneville200Transient non-communityGroundwater
41Idahoan Foods Idaho Falls PlantBonneville200Non-transient non-communityGroundwater
42Itd Clark Hill Rest AreaBonneville200Transient non-communityGroundwater
43Panorama Hills Water CompanyBonneville175CommunityGroundwater
44Yellowstone PlasticsBonneville165Non-transient non-communityGroundwater
45LDS West Pine Creek Rec Center-5112222Bonneville150Transient non-communityGroundwater
46Sunset Trailer RanchBonneville150CommunityGroundwater
47Telford ParkBonneville150Non-transient non-communityGroundwater
48Eagle FarmsBonneville130Non-transient non-communityGroundwater
49The Centre at Rainey CreekBonneville129CommunityGroundwater
50Lighthouse Montessori SchoolBonneville125Non-transient non-communityGroundwater

All other water systems in Bonneville County (76)

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

Bonneville County water systems: frequently asked questions

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

EPA's SDWIS records file 126 active public water systems under Bonneville County, Idaho: 32 community systems (25%), 32 non-transient non-community systems (25%) and 62 transient non-community systems (49%).

Who supplies drinking water in Bonneville County, ID?

The largest community water systems filed under Bonneville County are City of Idaho Falls (69,450 people served), Falls Water Company Inc. (22,650 people served) and City of Ammon (17,338 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 Bonneville County's drinking water come from groundwater or surface water?

Of the 126 active public water systems in Bonneville County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Idaho Falls, uses groundwater.

Where can I find a water quality report for Bonneville 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. 32 community systems are filed under Bonneville 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 Bonneville 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 Bonneville County, Idaho”, https://aquacensus.com/water-systems/idaho/bonneville (data as of October 1, 2026).