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Summit County, Colorado — public water systems

At a glance

42 active public water systems are filed under Summit County, Colorado in EPA's SDWIS records, together reporting 89,964 people served. The largest is Town of Breckenridge, which reports serving 28,315 people. 23 are community water systems serving people where they live; the other 19 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

42

Population served

90K

Community systems

23

Groundwater share

76.2%

How does Summit County compare with other Colorado counties?

Summit County has the 20th-most active public water systems among the 113 counties listed for active Colorado systems in EPA records; among the 65 with 3 or more systems, the median has 18. Its systems report 89,964 people served in total, the 14th-largest county figure in the state and 1.2% of the statewide total. The average system here reports serving 2,142 people, about 37% below the Colorado average of 3,400. 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 Summit County's drinking water come from?

By primary water source, Summit County's active systems draw on groundwater (28, 67%), surface water (10, 24%), groundwater under influence of surface water (3, 7.1%) and purchased groundwater under influence (1, 2.4%). Overall, 76% rely mainly on groundwater (including purchased groundwater) and 24% on surface water, compared with 74% and 26% across Colorado. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Town of Breckenridge, draws primarily on surface water.

What kinds of water systems operate in Summit County?

Summit County's active systems break down as 23 community systems (55%), 1 non-transient non-community systems (2.4%) and 18 transient non-community systems (43%). 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 (57%), local government (36%), federal government (4.8%) and state government (2.4%).

Water systems in Summit County

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Active public water systems in Summit County, Colorado
#Water systemCountyPopulation servedTypeSource
1Breckenridge Town ofSummit28,315CommunitySurface water
2Snake River WdSummit9,900CommunityGroundwater
3Silverthorne Town ofSummit8,400CommunityGroundwater
4Copper Mountain Consolidated MdSummit5,785CommunityGroundwater
5Frisco Town ofSummit4,495CommunitySurface water
6Cdot Vail Pass RaSummit3,302Transient non-communitySurface water
7Dillon Town ofSummit3,254CommunitySurface water
8Keystone Summit LodgeSummit3,241Transient non-communitySurface water
9Dillon Valley DistrictSummit3,063CommunitySurface water
10Buffalo Mountain MdSummit2,650CommunityGroundwater
11East Dillon WdSummit2,501CommunityGroundwater under influence of surface water
12Keystone Lodge IvSummit2,268Transient non-communityGroundwater
13AerieSummit2,077Non-transient non-communityGroundwater
14Arapahoe Basin Ski AreaSummit1,149Transient non-communitySurface water
15Keystone La Bontes CabinSummit972Transient non-communityGroundwater
16Breckenridge Ski Corp Peak 9Summit950Transient non-communitySurface water
17Arapahoe Basin Ski Area Midway LodgeSummit890Transient non-communityGroundwater
18Peak 8 Restaurant Vista HausSummit850Transient non-communitySurface water
19Breckenridge Mountain Resort Peak 7 WsSummit750Transient non-communityGroundwater
20Keystone RanchSummit670CommunityGroundwater
21Tiger Run Hoa Rv ParkSummit510Transient non-communityGroundwater under influence of surface water
22Breckenridge Peak 6 Warming HutSummit500Transient non-communityGroundwater
23Mesa Cortina WsdSummit466CommunityGroundwater
24Swan Meadow VillageSummit455CommunityPurchased groundwater under influence
25Timber Creek WdSummit312CommunityGroundwater
26Peak One Pine Cove CgSummit250Transient non-communityGroundwater
27Lowry Cg Prospector CgSummit225Transient non-communityGroundwater
28Hamilton Creek MdSummit200CommunitySurface water
29Swans Nest MdSummit200CommunityGroundwater under influence of surface water
30Sage Creek Canyon CorpSummit192CommunityGroundwater
31Alpensee WdSummit168CommunityGroundwater
32Farmers Korner MHPSummit159CommunityGroundwater
33Heeney Water DistrictSummit150CommunityGroundwater
34Blue River Valley Ranch LakesSummit150CommunityGroundwater
35Peak 8 Village CondosSummit127Transient non-communityGroundwater
36Willow Brook Metro DistrictSummit120CommunityGroundwater
37Good Times Adventure ToursSummit100Transient non-communityGroundwater
38Tanglewood WsSummit60CommunityGroundwater
39WaysideSummit40CommunityGroundwater
40Quandry Condos Skiers EdgeSummit34Transient non-communityGroundwater
41Agape Outpost Baptist ChapelSummit34Transient non-communityGroundwater
42Christ Lutheran Church SchoolSummit30Transient non-communityGroundwater

Summit County water systems: frequently asked questions

How many public water systems are in Summit County, Colorado?

EPA's SDWIS records file 42 active public water systems under Summit County, Colorado: 23 community systems (55%), 1 non-transient non-community systems (2.4%) and 18 transient non-community systems (43%).

Who supplies drinking water in Summit County, CO?

The largest community water systems filed under Summit County are Town of Breckenridge (28,315 people served), Snake River Wd (9,900 people served) and Town of Silverthorne (8,400 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 Summit County's drinking water come from groundwater or surface water?

Of the 42 active public water systems in Summit County, 76% draw mainly on groundwater and 24% on surface water, counting purchased supplies. The largest system, Town of Breckenridge, uses surface water.

Where can I find a water quality report for Summit 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. 23 community systems are filed under Summit 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 Summit 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 Colorado 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 Summit County, Colorado”, https://aquacensus.com/water-systems/colorado/summit (data as of October 1, 2026).