Valley County, Idaho — public water systems
At a glance
57 active public water systems are filed under Valley County, Idaho in EPA's SDWIS records, together reporting 12,448 people served. The largest is City of Mccall, which reports serving 4,423 people. 11 are community water systems serving people where they live; the other 46 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
57
Population served
12.4K
Community systems
11
Groundwater share
93%
How does Valley County compare with other Idaho counties?
Valley County has the 9th-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 12,448 people served in total, the 21st-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 218 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 Valley County's drinking water come from?
By primary water source, Valley County's active systems draw on groundwater (53, 93%) and surface water (4, 7%). Overall, 93% rely mainly on groundwater (including purchased groundwater) and 7% 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 Mccall, draws primarily on surface water.
What kinds of water systems operate in Valley County?
Valley County's active systems break down as 11 community systems (19%), 5 non-transient non-community systems (8.8%) and 41 transient non-community systems (72%). 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 (74%), state government (12%), local government (7%) and federal government (7%).
The 50 largest water systems in Valley County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Mccall City of | Valley | 4,423 | Community | Surface water |
| 2 | Cascade City of | Valley | 1,000 | Community | Groundwater |
| 3 | Idpr Ponderosa Sp | Valley | 1,000 | Transient non-community | Groundwater |
| 4 | Meadows at West Mountain | Valley | 550 | Community | Groundwater |
| 5 | Tamarack Resort Association Inc. | Valley | 400 | Non-transient non-community | Groundwater |
| 6 | Fir Grove Estates | Valley | 270 | Community | Groundwater |
| 7 | Day Star | Valley | 250 | Community | Groundwater |
| 8 | Camp Ee-De-How | Valley | 250 | Transient non-community | Groundwater |
| 9 | Donnelly City of | Valley | 237 | Community | Groundwater |
| 10 | Ymca Horsethief Camp | Valley | 220 | Transient non-community | Surface water |
| 11 | Siscra | Valley | 200 | Transient non-community | Groundwater |
| 12 | Tamarack Mid-Mountain Restaurant | Valley | 200 | Transient non-community | Groundwater |
| 13 | Cascade Lake 4h Camp | Valley | 200 | Transient non-community | Groundwater |
| 14 | Jughandle Estates | Valley | 200 | Community | Groundwater |
| 15 | Camp Ida Haven | Valley | 150 | Transient non-community | Groundwater |
| 16 | Lakefork Merc | Valley | 150 | Transient non-community | Groundwater |
| 17 | Blackhawk on the River | Valley | 150 | Community | Groundwater |
| 18 | Warm Lake Bible Camp | Valley | 140 | Transient non-community | Groundwater |
| 19 | Clear Creek Station | Valley | 130 | Transient non-community | Groundwater |
| 20 | Tamarack Bay Condominiums | Valley | 130 | Non-transient non-community | Groundwater |
| 21 | Warm Lake Recreational Water District | Valley | 124 | Transient non-community | Groundwater |
| 22 | Perpetua Resources | Valley | 120 | Non-transient non-community | Groundwater |
| 23 | Shiloh Bible Conference | Valley | 110 | Transient non-community | Groundwater |
| 24 | Camp Cascade | Valley | 100 | Transient non-community | Groundwater |
| 25 | LDS Mccall Ward Chapel | Valley | 100 | Transient non-community | Groundwater |
| 26 | Jug Mountain Ranch Subdivision | Valley | 100 | Community | Groundwater |
| 27 | Usfs Indian Creek Guard Station | Valley | 100 | Transient non-community | Groundwater |
| 28 | Usfs Silver Creek Campground | Valley | 100 | Transient non-community | Groundwater |
| 29 | Idpr Lake Cascade Sp Buttercup Cg | Valley | 90 | Transient non-community | Groundwater |
| 30 | Paradise Point | Valley | 80 | Transient non-community | Surface water |
| 31 | Ywam Idaho Boise Cascade Inc. | Valley | 75 | Transient non-community | Groundwater |
| 32 | Silver Creek Plunge | Valley | 75 | Transient non-community | Groundwater |
| 33 | Idpr Lake Cascade Sp Huckleberry Cg | Valley | 75 | Transient non-community | Groundwater |
| 34 | Yellow Pine Water Users Inc. | Valley | 72 | Community | Surface water |
| 35 | K P Cove Subd | Valley | 70 | Transient non-community | Groundwater |
| 36 | Mccall Activity Barn | Valley | 65 | Transient non-community | Groundwater |
| 37 | Black Bear Rv Park | Valley | 60 | Transient non-community | Groundwater |
| 38 | Hawks Bay Estates Hoa LLC | Valley | 59 | Community | Groundwater |
| 39 | Cascade Christian Church Camp | Valley | 50 | Transient non-community | Groundwater |
| 40 | Pilgrim Cove Camp | Valley | 50 | Transient non-community | Groundwater |
| 41 | Usfs Boundary Creek Campground | Valley | 50 | Transient non-community | Groundwater |
| 42 | Mountain Life Church | Valley | 50 | Transient non-community | Groundwater |
| 43 | Idpr Lake Cascade Sp West Mountain Cg | Valley | 40 | Transient non-community | Groundwater |
| 44 | Usfs Shoreline Campground and Picnic Poi | Valley | 40 | Transient non-community | Groundwater |
| 45 | West Mountain Cottages Inc. | Valley | 36 | Transient non-community | Groundwater |
| 46 | Wellington Campground | Valley | 30 | Transient non-community | Groundwater |
| 47 | Alzar School Inc. | Valley | 27 | Non-transient non-community | Groundwater |
| 48 | Camp John Paul Ii | Valley | 25 | Transient non-community | Groundwater |
| 49 | Idpr Lake Cascade Sp Boulder Creek Cg | Valley | 25 | Transient non-community | Groundwater |
| 50 | Ferguson Plumbing | Valley | 25 | Transient non-community | Groundwater |
All other water systems in Valley County (7)
The remaining active systems filed under Valley County, largest first, with the population each reports serving.
Valley County water systems: frequently asked questions
How many public water systems are in Valley County, Idaho?
EPA's SDWIS records file 57 active public water systems under Valley County, Idaho: 11 community systems (19%), 5 non-transient non-community systems (8.8%) and 41 transient non-community systems (72%).
Who supplies drinking water in Valley County, ID?
The largest community water systems filed under Valley County are City of Mccall (4,423 people served), City of Cascade (1,000 people served) and Meadows at West Mountain (550 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 Valley County's drinking water come from groundwater or surface water?
Of the 57 active public water systems in Valley County, 93% draw mainly on groundwater and 7% on surface water, counting purchased supplies. The largest system, City of Mccall, uses surface water.
Where can I find a water quality report for Valley 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 Valley 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 Valley 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 Valley County, Idaho”, https://aquacensus.com/water-systems/idaho/valley (data as of October 1, 2026).