Public water system · CO0159045
ActiveEast Dillon Wd
At a glance
East Dillon Wd (PWSID CO0159045) is an active community water system in Summit County, Colorado. It reports serving 2,501 people through 1,515 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; none is health-based, and the most recent began in September 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,501
Service connections
1,515
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does East Dillon Wd compare with other water systems in Summit County?
By EPA's size categories, East Dillon Wd is a small system (501 to 3,300 people). Summit County has 42 active public water systems. Its population served is about 17% above the county average of 2,142 people per system, and accounts for 2.8% 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 East Dillon Wd is about 63% 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 under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 166 Colorado systems (7.5%) list groundwater under influence of surface water as their primary source.
Who owns and regulates East Dillon Wd?
EPA lists East Dillon Wd as owned by a local government. 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. 15 of the 42 active systems in Summit County (36%) are also owned by a local government.
Does East Dillon Wd have drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in September 2023. The violations listed here began between July 2003 and September 2023. By type: 7 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (2 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2023-09-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2023-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Source Water (LT2) · code 32 | E. colicode 3014 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 9 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.
East Dillon Wd: frequently asked questions
Who runs East Dillon Wd?
East Dillon Wd (PWSID CO0159045) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does East Dillon Wd serve?
East Dillon Wd reports serving 2,501 people through 1,515 service connections in Summit County, Colorado.
Where does East Dillon Wd get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does East Dillon Wd have any drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in September 2023. 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 East Dillon Wd'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 9 violations for this system; none is health-based, and the most recent began in September 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find East Dillon Wd's water quality report?
As a community water system, East Dillon Wd 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, “East Dillon Wd, PWSID CO0159045, Colorado”, https://aquacensus.com/water-systems/colorado/east-dillon-wd-co0159045 (data as of October 1, 2026).