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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

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Active public water systems in Valley County, Idaho
#Water systemCountyPopulation servedTypeSource
1Mccall City ofValley4,423CommunitySurface water
2Cascade City ofValley1,000CommunityGroundwater
3Idpr Ponderosa SpValley1,000Transient non-communityGroundwater
4Meadows at West MountainValley550CommunityGroundwater
5Tamarack Resort Association Inc.Valley400Non-transient non-communityGroundwater
6Fir Grove EstatesValley270CommunityGroundwater
7Day StarValley250CommunityGroundwater
8Camp Ee-De-HowValley250Transient non-communityGroundwater
9Donnelly City ofValley237CommunityGroundwater
10Ymca Horsethief CampValley220Transient non-communitySurface water
11SiscraValley200Transient non-communityGroundwater
12Tamarack Mid-Mountain RestaurantValley200Transient non-communityGroundwater
13Cascade Lake 4h CampValley200Transient non-communityGroundwater
14Jughandle EstatesValley200CommunityGroundwater
15Camp Ida HavenValley150Transient non-communityGroundwater
16Lakefork MercValley150Transient non-communityGroundwater
17Blackhawk on the RiverValley150CommunityGroundwater
18Warm Lake Bible CampValley140Transient non-communityGroundwater
19Clear Creek StationValley130Transient non-communityGroundwater
20Tamarack Bay CondominiumsValley130Non-transient non-communityGroundwater
21Warm Lake Recreational Water DistrictValley124Transient non-communityGroundwater
22Perpetua ResourcesValley120Non-transient non-communityGroundwater
23Shiloh Bible ConferenceValley110Transient non-communityGroundwater
24Camp CascadeValley100Transient non-communityGroundwater
25LDS Mccall Ward ChapelValley100Transient non-communityGroundwater
26Jug Mountain Ranch SubdivisionValley100CommunityGroundwater
27Usfs Indian Creek Guard StationValley100Transient non-communityGroundwater
28Usfs Silver Creek CampgroundValley100Transient non-communityGroundwater
29Idpr Lake Cascade Sp Buttercup CgValley90Transient non-communityGroundwater
30Paradise PointValley80Transient non-communitySurface water
31Ywam Idaho Boise Cascade Inc.Valley75Transient non-communityGroundwater
32Silver Creek PlungeValley75Transient non-communityGroundwater
33Idpr Lake Cascade Sp Huckleberry CgValley75Transient non-communityGroundwater
34Yellow Pine Water Users Inc.Valley72CommunitySurface water
35K P Cove SubdValley70Transient non-communityGroundwater
36Mccall Activity BarnValley65Transient non-communityGroundwater
37Black Bear Rv ParkValley60Transient non-communityGroundwater
38Hawks Bay Estates Hoa LLCValley59CommunityGroundwater
39Cascade Christian Church CampValley50Transient non-communityGroundwater
40Pilgrim Cove CampValley50Transient non-communityGroundwater
41Usfs Boundary Creek CampgroundValley50Transient non-communityGroundwater
42Mountain Life ChurchValley50Transient non-communityGroundwater
43Idpr Lake Cascade Sp West Mountain CgValley40Transient non-communityGroundwater
44Usfs Shoreline Campground and Picnic PoiValley40Transient non-communityGroundwater
45West Mountain Cottages Inc.Valley36Transient non-communityGroundwater
46Wellington CampgroundValley30Transient non-communityGroundwater
47Alzar School Inc.Valley27Non-transient non-communityGroundwater
48Camp John Paul IiValley25Transient non-communityGroundwater
49Idpr Lake Cascade Sp Boulder Creek CgValley25Transient non-communityGroundwater
50Ferguson PlumbingValley25Transient non-communityGroundwater

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).