Boise County, Idaho — public water systems
At a glance
55 active public water systems are filed under Boise County, Idaho in EPA's SDWIS records, together reporting 7,448 people served. The largest is Idpr Lucky Peak Sp Spring Shores, which reports serving 780 people. 20 are community water systems serving people where they live; the other 35 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
55
Population served
7.4K
Community systems
20
Groundwater share
87.3%
How does Boise County compare with other Idaho counties?
Boise County has the 11th-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 7,448 people served in total, the 29th-largest county figure in the state and 0.4% of the statewide total. The average system here reports serving 135 people, well below 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 Boise County's drinking water come from?
By primary water source, Boise County's active systems draw on groundwater (48, 87%) and surface water (7, 13%). Overall, 87% rely mainly on groundwater (including purchased groundwater) and 13% 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, Idpr Lucky Peak Sp Spring Shores, draws primarily on groundwater.
What kinds of water systems operate in Boise County?
Boise County's active systems break down as 20 community systems (36%), 5 non-transient non-community systems (9.1%) and 30 transient non-community systems (55%). 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 (89%), local government (3.6%), federal government (3.6%) and public/private partnership (1.8%).
The 50 largest water systems in Boise County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Idpr Lucky Peak Sp Spring Shores | Boise | 780 | Transient non-community | Groundwater |
| 2 | Bogus Basin Mtn Resort | Boise | 750 | Non-transient non-community | Surface water |
| 3 | Horseshoe Bend Water Supply | Boise | 750 | Community | Surface water |
| 4 | Idaho City Water Dept | Boise | 531 | Community | Surface water |
| 5 | Wilderness Ranch Owners Association Inc. | Boise | 525 | Community | Surface water |
| 6 | Terrace Lakes Water Company | Boise | 475 | Community | Groundwater |
| 7 | Scriver Woods Homeowners Assn | Boise | 310 | Community | Groundwater |
| 8 | Mountain View Water and Road Assn | Boise | 305 | Community | Groundwater |
| 9 | Castle Mountain Creeks Owners Assn | Boise | 250 | Community | Surface water |
| 10 | Garden Valley High School | Boise | 200 | Non-transient non-community | Groundwater |
| 11 | Duquette Pines Homeowners Association | Boise | 163 | Community | Groundwater |
| 12 | Crouch Community Church | Boise | 160 | Transient non-community | Groundwater |
| 13 | Valley Hi Estates | Boise | 140 | Community | Groundwater |
| 14 | Mores Creek Rim Ranch Water Dist | Boise | 140 | Community | Surface water |
| 15 | Rivers Point Property Owners Assn | Boise | 140 | Community | Surface water |
| 16 | Starlight Mountain Theater | Boise | 100 | Transient non-community | Groundwater |
| 17 | Osprey | Boise | 100 | Community | Groundwater |
| 18 | LDS Garden Valley Meeting House | Boise | 100 | Transient non-community | Groundwater |
| 19 | Calvary Chapel of Garden Valley | Boise | 100 | Transient non-community | Groundwater |
| 20 | Mountain Shadows Hoa Inc.. | Boise | 89 | Community | Groundwater |
| 21 | Garden Valley Ranchettes Homeowners | Boise | 78 | Community | Groundwater |
| 22 | Usace Macks Creek Park | Boise | 75 | Transient non-community | Groundwater |
| 23 | Karney Lakes Club | Boise | 70 | Transient non-community | Groundwater |
| 24 | Ranch Subd | Boise | 65 | Community | Groundwater |
| 25 | Sawtooth Lodge | Boise | 65 | Transient non-community | Groundwater |
| 26 | Horseshu Vue Ranch Subd | Boise | 51 | Community | Groundwater |
| 27 | Clear Creek Lodge | Boise | 50 | Transient non-community | Groundwater |
| 28 | River Canyon Retreat | Boise | 50 | Transient non-community | Groundwater |
| 29 | LDS Camp Glenwood | Boise | 50 | Transient non-community | Groundwater |
| 30 | Pinetop Church Camp | Boise | 50 | Transient non-community | Groundwater |
| 31 | Ten Ax Subdivision Water Assn | Boise | 44 | Transient non-community | Groundwater |
| 32 | Shilo Ranch Estates | Boise | 44 | Community | Groundwater |
| 33 | Scenic Properties Water Assn Inc. | Boise | 40 | Community | Groundwater |
| 34 | River at Pine Tree | Boise | 40 | Non-transient non-community | Groundwater |
| 35 | Boise Holcomb Water Users Assoc. Inc. | Boise | 36 | Community | Groundwater |
| 36 | Cascade Raft and Kayak | Boise | 35 | Transient non-community | Groundwater |
| 37 | Usfs Lowman Ranger Station Pc | Boise | 35 | Non-transient non-community | Groundwater |
| 38 | Lowman Inn | Boise | 30 | Transient non-community | Groundwater |
| 39 | Project Patch | Boise | 30 | Non-transient non-community | Groundwater |
| 40 | Hi De Ho Sports Trailer Club | Boise | 30 | Transient non-community | Groundwater |
| 41 | Sourdough Lodge | Boise | 25 | Transient non-community | Groundwater |
| 42 | Riverpond Campground | Boise | 25 | Transient non-community | Groundwater |
| 43 | Haven Hot Springs | Boise | 25 | Transient non-community | Groundwater |
| 44 | Garden Valley Motel | Boise | 25 | Transient non-community | Groundwater |
| 45 | Lowman Rv Park | Boise | 25 | Transient non-community | Groundwater |
| 46 | Garden Valley Chevron | Boise | 25 | Transient non-community | Groundwater |
| 47 | Garden Valley Library | Boise | 25 | Transient non-community | Groundwater |
| 48 | Banks Store and Cafe | Boise | 25 | Transient non-community | Groundwater |
| 49 | Crouch City Hall and Community | Boise | 25 | Transient non-community | Groundwater |
| 50 | Crouch City of | Boise | 25 | Transient non-community | Groundwater |
All other water systems in Boise County (5)
The remaining active systems filed under Boise County, largest first, with the population each reports serving.
Boise County water systems: frequently asked questions
How many public water systems are in Boise County, Idaho?
EPA's SDWIS records file 55 active public water systems under Boise County, Idaho: 20 community systems (36%), 5 non-transient non-community systems (9.1%) and 30 transient non-community systems (55%).
Who supplies drinking water in Boise County, ID?
The largest community water systems filed under Boise County are Horseshoe Bend Water Supply (750 people served), Idaho City Water Dept (531 people served) and Wilderness Ranch Owners Association Inc. (525 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 Boise County's drinking water come from groundwater or surface water?
Of the 55 active public water systems in Boise County, 87% draw mainly on groundwater and 13% on surface water, counting purchased supplies. The largest system, Idpr Lucky Peak Sp Spring Shores, uses groundwater.
Where can I find a water quality report for Boise 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. 20 community systems are filed under Boise 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 Boise 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
- All Idaho public water systems· 1,961 active
- Bingham County· 67 systems
- Jefferson County· 61 systems
- Valley County· 57 systems
- Custer County· 57 systems
- Idaho County· 54 systems
- Twin Falls County· 54 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 Boise County, Idaho”, https://aquacensus.com/water-systems/idaho/boise (data as of October 1, 2026).