Public water system · CO0159035
ActiveDillon Town of
At a glance
Town of Dillon (PWSID CO0159035) is an active community water system in Summit County, Colorado. It reports serving 3,254 people through 566 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,254
Service connections
566
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Town of Dillon compare with other water systems in Summit County?
By EPA's size categories, Town of Dillon is a small system (501 to 3,300 people). Summit County has 42 active public water systems. Its population served is about 52% above the county average of 2,142 people per system, and accounts for 3.6% 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 Town of Dillon is about half of 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 228 Colorado systems (10%) list surface water as their primary source.
Who owns and regulates Town of Dillon?
EPA lists Town of Dillon 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 Town of Dillon have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2023. The violations listed here began between July 2006 and July 2023. By type: 10 monitoring and reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (3 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2023-07-01 | 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 |
| 2017-10-01 | Monitoring and reportingMonitoring, Source Water (LT2) · code 32 | E. colicode 3014 | No | Resolved |
| 2016-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2016-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2007-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
All 10 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.
Town of Dillon: frequently asked questions
Who runs Town of Dillon?
Town of Dillon (PWSID CO0159035) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does Town of Dillon serve?
Town of Dillon reports serving 3,254 people through 566 service connections in Summit County, Colorado.
Where does Town of Dillon get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Town of Dillon have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 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 Town of Dillon'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 10 violations for this system; none is health-based, and the most recent began in July 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 Town of Dillon's water quality report?
As a community water system, Town of Dillon 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, “Dillon Town of, PWSID CO0159035, Colorado”, https://aquacensus.com/water-systems/colorado/dillon-town-of-co0159035 (data as of October 1, 2026).