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
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Breckenridge Town of | Summit | 28,315 | Community | Surface water |
| 2 | Snake River Wd | Summit | 9,900 | Community | Groundwater |
| 3 | Silverthorne Town of | Summit | 8,400 | Community | Groundwater |
| 4 | Copper Mountain Consolidated Md | Summit | 5,785 | Community | Groundwater |
| 5 | Frisco Town of | Summit | 4,495 | Community | Surface water |
| 6 | Cdot Vail Pass Ra | Summit | 3,302 | Transient non-community | Surface water |
| 7 | Dillon Town of | Summit | 3,254 | Community | Surface water |
| 8 | Keystone Summit Lodge | Summit | 3,241 | Transient non-community | Surface water |
| 9 | Dillon Valley District | Summit | 3,063 | Community | Surface water |
| 10 | Buffalo Mountain Md | Summit | 2,650 | Community | Groundwater |
| 11 | East Dillon Wd | Summit | 2,501 | Community | Groundwater under influence of surface water |
| 12 | Keystone Lodge Iv | Summit | 2,268 | Transient non-community | Groundwater |
| 13 | Aerie | Summit | 2,077 | Non-transient non-community | Groundwater |
| 14 | Arapahoe Basin Ski Area | Summit | 1,149 | Transient non-community | Surface water |
| 15 | Keystone La Bontes Cabin | Summit | 972 | Transient non-community | Groundwater |
| 16 | Breckenridge Ski Corp Peak 9 | Summit | 950 | Transient non-community | Surface water |
| 17 | Arapahoe Basin Ski Area Midway Lodge | Summit | 890 | Transient non-community | Groundwater |
| 18 | Peak 8 Restaurant Vista Haus | Summit | 850 | Transient non-community | Surface water |
| 19 | Breckenridge Mountain Resort Peak 7 Ws | Summit | 750 | Transient non-community | Groundwater |
| 20 | Keystone Ranch | Summit | 670 | Community | Groundwater |
| 21 | Tiger Run Hoa Rv Park | Summit | 510 | Transient non-community | Groundwater under influence of surface water |
| 22 | Breckenridge Peak 6 Warming Hut | Summit | 500 | Transient non-community | Groundwater |
| 23 | Mesa Cortina Wsd | Summit | 466 | Community | Groundwater |
| 24 | Swan Meadow Village | Summit | 455 | Community | Purchased groundwater under influence |
| 25 | Timber Creek Wd | Summit | 312 | Community | Groundwater |
| 26 | Peak One Pine Cove Cg | Summit | 250 | Transient non-community | Groundwater |
| 27 | Lowry Cg Prospector Cg | Summit | 225 | Transient non-community | Groundwater |
| 28 | Hamilton Creek Md | Summit | 200 | Community | Surface water |
| 29 | Swans Nest Md | Summit | 200 | Community | Groundwater under influence of surface water |
| 30 | Sage Creek Canyon Corp | Summit | 192 | Community | Groundwater |
| 31 | Alpensee Wd | Summit | 168 | Community | Groundwater |
| 32 | Farmers Korner MHP | Summit | 159 | Community | Groundwater |
| 33 | Heeney Water District | Summit | 150 | Community | Groundwater |
| 34 | Blue River Valley Ranch Lakes | Summit | 150 | Community | Groundwater |
| 35 | Peak 8 Village Condos | Summit | 127 | Transient non-community | Groundwater |
| 36 | Willow Brook Metro District | Summit | 120 | Community | Groundwater |
| 37 | Good Times Adventure Tours | Summit | 100 | Transient non-community | Groundwater |
| 38 | Tanglewood Ws | Summit | 60 | Community | Groundwater |
| 39 | Wayside | Summit | 40 | Community | Groundwater |
| 40 | Quandry Condos Skiers Edge | Summit | 34 | Transient non-community | Groundwater |
| 41 | Agape Outpost Baptist Chapel | Summit | 34 | Transient non-community | Groundwater |
| 42 | Christ Lutheran Church School | Summit | 30 | Transient non-community | Groundwater |
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
- All Colorado public water systems· 2,207 active
- Pitkin County· 49 systems
- Rio Grande County· 48 systems
- Eagle County· 46 systems
- Delta County· 42 systems
- Arapahoe County· 39 systems
- Clear Creek County· 32 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 Summit County, Colorado”, https://aquacensus.com/water-systems/colorado/summit (data as of October 1, 2026).