Public water system · CO0159065
ActiveKeystone Ranch
At a glance
Keystone Ranch (PWSID CO0159065) is an active community water system in Summit County, Colorado. It reports serving 670 people through 108 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
670
Service connections
108
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Keystone Ranch compare with other water systems in Summit County?
By EPA's size categories, Keystone Ranch is a small system (501 to 3,300 people). Summit County has 42 active public water systems. Its population served is well below the county average of 2,142 people per system, and accounts for 0.7% of the 89,964 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active community water system reports serving 6,703 people, so Keystone Ranch is well below that figure.
What does “community water system” mean?
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. Colorado has 1,068 active community water systems, 48% of the state's 2,207 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,437 Colorado systems (65%) list groundwater as their primary source.
Who owns and regulates Keystone Ranch?
EPA lists Keystone Ranch as privately owned. The CO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 24 of the 42 active systems in Summit County (57%) are also privately owned.
Does Keystone Ranch have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2024. The violations listed here began between January 1993 and December 2024. By type: 2 monitoring and reporting and 1 required treatment not met. The contaminants or rules involved are Lead and Copper Rule, Total coliform bacteria (TCR) and Nitrate. EPA lists 3 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2002-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 3 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Keystone Ranch: frequently asked questions
Who runs Keystone Ranch?
Keystone Ranch (PWSID CO0159065) is a community water system privately owned. It is regulated by the CO state drinking water program.
How many people does Keystone Ranch serve?
Keystone Ranch reports serving 670 people through 108 service connections in Summit County, Colorado.
Where does Keystone Ranch get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Keystone Ranch have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Keystone Ranch's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find Keystone Ranch's water quality report?
As a community water system, Keystone Ranch must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Summit County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Breckenridge Town of | Summit | 28,315 | Community | Surface water |
| Snake River Wd | Summit | 9,900 | Community | Groundwater |
| Silverthorne Town of | Summit | 8,400 | Community | Groundwater |
| Copper Mountain Consolidated Md | Summit | 5,785 | Community | Groundwater |
| Frisco Town of | Summit | 4,495 | Community | Surface water |
| Cdot Vail Pass Ra | Summit | 3,302 | Transient non-community | Surface water |
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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, “Keystone Ranch, PWSID CO0159065, Colorado”, https://aquacensus.com/water-systems/colorado/keystone-ranch-co0159065 (data as of October 1, 2026).