Blaine County, Idaho — public water systems
At a glance
43 active public water systems are filed under Blaine County, Idaho in EPA's SDWIS records, together reporting 23,727 people served. The largest is Hailey Water and Sewer, which reports serving 8,000 people. 20 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
43
Population served
23.7K
Community systems
20
Groundwater share
100%
How does Blaine County compare with other Idaho counties?
Blaine County has the 17th-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 23,727 people served in total, the 13th-largest county figure in the state and 1.3% of the statewide total. The average system here reports serving 552 people, about 39% 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 Blaine County's drinking water come from?
By primary water source, Blaine County's active systems draw on groundwater (43, 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, Hailey Water and Sewer, draws primarily on groundwater.
What kinds of water systems operate in Blaine County?
Blaine County's active systems break down as 20 community systems (47%), 1 non-transient non-community systems (2.3%) and 22 transient non-community systems (51%). 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 (63%), federal government (16%), local government (14%) and public/private partnership (4.7%).
Water systems in Blaine County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Hailey Water and Sewer | Blaine | 8,000 | Community | Groundwater |
| 2 | Ketchum City of | Blaine | 3,555 | Community | Groundwater |
| 3 | Sun Valley Water and Sewer Dist | Blaine | 3,400 | Community | Groundwater |
| 4 | Bellevue City of | Blaine | 2,747 | Community | Groundwater |
| 5 | Bald Mountain | Blaine | 1,000 | Transient non-community | Groundwater |
| 6 | Carey Water and Sewer | Blaine | 993 | Community | Groundwater |
| 7 | Mid Valley Water Company LLC | Blaine | 450 | Community | Groundwater |
| 8 | Hulen Meadows Water Company | Blaine | 390 | Community | Groundwater |
| 9 | Cold Springs Subd | Blaine | 300 | Community | Groundwater |
| 10 | Usfs Alturas Lake Water System | Blaine | 202 | Transient non-community | Groundwater |
| 11 | LDS Camp Manapu | Blaine | 200 | Transient non-community | Groundwater |
| 12 | Heatherlands Subd | Blaine | 200 | Community | Groundwater |
| 13 | LDS Camp Cabin Creek | Blaine | 200 | Transient non-community | Groundwater |
| 14 | Starweather Estates | Blaine | 150 | Community | Groundwater |
| 15 | The Valley Club | Blaine | 135 | Community | Groundwater |
| 16 | Usfs Snra Head Quarters Bldg | Blaine | 130 | Transient non-community | Groundwater |
| 17 | Galena Lodge | Blaine | 120 | Transient non-community | Groundwater |
| 18 | Golden Eagle Ranch | Blaine | 120 | Community | Groundwater |
| 19 | Smiley Creek Water Users Assn Inc. | Blaine | 117 | Community | Groundwater |
| 20 | Usfs Wood River Campground | Blaine | 100 | Transient non-community | Groundwater |
| 21 | Ritzau Park Fountain | Blaine | 100 | Transient non-community | Groundwater |
| 22 | Luther Heights Bible Camp | Blaine | 100 | Transient non-community | Groundwater |
| 23 | Camp Sawtooth Presbyterian | Blaine | 85 | Transient non-community | Groundwater |
| 24 | Camp Perkins Lutheran Outdoor Ministries | Blaine | 80 | Transient non-community | Groundwater |
| 25 | Usfs Easley Campground | Blaine | 78 | Transient non-community | Groundwater |
| 26 | Greenhorn Subd | Blaine | 75 | Community | Groundwater |
| 27 | Aspen Hollow Homeowners Assoc | Blaine | 75 | Community | Groundwater |
| 28 | Woodenhills Water Works | Blaine | 62 | Community | Groundwater |
| 29 | Gannett Homeowners Assn | Blaine | 60 | Community | Groundwater |
| 30 | Sage Springs Subdivision | Blaine | 53 | Community | Groundwater |
| 31 | Cathedral Pines Baptist Camp | Blaine | 50 | Transient non-community | Groundwater |
| 32 | Picabo Water System | Blaine | 50 | Community | Groundwater |
| 33 | Magic Westside Water Users Inc. | Blaine | 47 | Transient non-community | Groundwater |
| 34 | Holiday Highway Subd | Blaine | 45 | Community | Groundwater |
| 35 | Gannett Country Club | Blaine | 45 | Transient non-community | Groundwater |
| 36 | Usfs Tincup Hiker Transfer Cp | Blaine | 38 | Transient non-community | Groundwater |
| 37 | Smiley Creek Dump Station | Blaine | 25 | Transient non-community | Groundwater |
| 38 | LDS Camp Smokey Lodge | Blaine | 25 | Transient non-community | Groundwater |
| 39 | Timmerman Hill Rest Area Itd | Blaine | 25 | Transient non-community | Groundwater |
| 40 | Life Church | Blaine | 25 | Transient non-community | Groundwater |
| 41 | Boxcar Fountain | Blaine | 25 | Transient non-community | Groundwater |
| 42 | Usfs Boundary Picnic Area | Blaine | 25 | Transient non-community | Groundwater |
| 43 | Mountain Humane | Blaine | 25 | Non-transient non-community | Groundwater |
Blaine County water systems: frequently asked questions
How many public water systems are in Blaine County, Idaho?
EPA's SDWIS records file 43 active public water systems under Blaine County, Idaho: 20 community systems (47%), 1 non-transient non-community systems (2.3%) and 22 transient non-community systems (51%).
Who supplies drinking water in Blaine County, ID?
The largest community water systems filed under Blaine County are Hailey Water and Sewer (8,000 people served), City of Ketchum (3,555 people served) and Sun Valley Water and Sewer Dist (3,400 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 Blaine County's drinking water come from groundwater or surface water?
Of the 43 active public water systems in Blaine County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Hailey Water and Sewer, uses groundwater.
Where can I find a water quality report for Blaine 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 Blaine 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 Blaine 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
- Twin Falls County· 54 systems
- Cassia County· 49 systems
- Bannock County· 47 systems
- Elmore County· 44 systems
- Lemhi County· 42 systems
- Shoshone County· 37 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 Blaine County, Idaho”, https://aquacensus.com/water-systems/idaho/blaine (data as of October 1, 2026).