Public water system · CO0150900
ActiveWiley Town of
At a glance
Town of Wiley (PWSID CO0150900) is an active community water system in Prowers County, Colorado. It reports serving 405 people through 216 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
405
Service connections
216
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Town of Wiley compare with other water systems in Prowers County?
By EPA's size categories, Town of Wiley is a very small system (500 people or fewer). Prowers County has 10 active public water systems, and Town of Wiley is the 5th-largest of them by population served. Its population served is about 65% below the county average of 1,167 people per system, and accounts for 3.5% of the 11,670 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 Wiley 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 Town of Wiley?
EPA lists Town of Wiley 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. 6 of the 10 active systems in Prowers County (60%) are also owned by a local government.
Does Town of Wiley have drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2011. The violations listed here began between October 1992 and July 2011. By type: 4 monitoring and reporting, 2 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (2 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2010-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 1997-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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 Wiley: frequently asked questions
Who runs Town of Wiley?
Town of Wiley (PWSID CO0150900) 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 Wiley serve?
Town of Wiley reports serving 405 people through 216 service connections in Prowers County, Colorado.
Where does Town of Wiley 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 Town of Wiley have any drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2011. 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 Wiley'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 8 violations for this system; 2 are health-based, and the most recent began in July 2011. 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 Wiley's water quality report?
As a community water system, Town of Wiley 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 Prowers County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lamar City of | Prowers | 7,500 | Community | Groundwater |
| May Valley Wa | Prowers | 1,500 | Community | Groundwater |
| Holly Town of | Prowers | 800 | Community | Groundwater |
| Granada Town of | Prowers | 515 | Community | Groundwater |
| Granada Rural Water Authority | Prowers | 378 | Community | Groundwater |
| Prosperity Lane Wa | Prowers | 260 | Community | Purchased 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, “Wiley Town of, PWSID CO0150900, Colorado”, https://aquacensus.com/water-systems/colorado/wiley-town-of-co0150900 (data as of October 1, 2026).