Public water system · CO0148005
ActiveHolyoke City of
At a glance
City of Holyoke (PWSID CO0148005) is an active community water system in Phillips County, Colorado. It reports serving 2,540 people through 1,129 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,540
Service connections
1,129
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Holyoke compare with other water systems in Phillips County?
By EPA's size categories, City of Holyoke is a small system (501 to 3,300 people). Phillips County has 4 active public water systems, and City of Holyoke is the largest of them by population served. Its population served is about 183% above the county average of 898 people per system, and accounts for 71% of the 3,593 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 City of Holyoke is about 62% 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 City of Holyoke?
EPA lists City of Holyoke 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. 3 of the 4 active systems in Phillips County (75%) are also owned by a local government.
Does City of Holyoke have drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2020. The violations listed here began between November 1991 and October 2020. By type: 6 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Diquat (4 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 |
|---|---|---|---|---|
| 2020-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2020-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 1994-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
City of Holyoke: frequently asked questions
Who runs City of Holyoke?
City of Holyoke (PWSID CO0148005) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does City of Holyoke serve?
City of Holyoke reports serving 2,540 people through 1,129 service connections in Phillips County, Colorado.
Where does City of Holyoke 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 City of Holyoke have any drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2020. 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 City of Holyoke'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; 3 are health-based, and the most recent began in October 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find City of Holyoke's water quality report?
As a community water system, City of Holyoke 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 Phillips County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Haxtun Town of | Phillips | 963 | Community | Groundwater |
| Blisties | Phillips | 48 | Transient non-community | Groundwater |
| Paoli Town of | Phillips | 42 | Community | Groundwater |
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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, “Holyoke City of, PWSID CO0148005, Colorado”, https://aquacensus.com/water-systems/colorado/holyoke-city-of-co0148005 (data as of October 1, 2026).