Public water system · IA3189001
ActiveWorthington Water Supply
At a glance
Worthington Water Supply (PWSID IA3189001) is an active community water system in Dubuque County, Iowa. It reports serving 382 people through 187 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2001.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
382
Service connections
187
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Worthington Water Supply compare with other water systems in Dubuque County?
By EPA's size categories, Worthington Water Supply is a very small system (500 people or fewer). Dubuque County has 74 active public water systems. Its population served is well below the county average of 1,255 people per system, and accounts for 0.4% of the 92,853 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Worthington Water Supply 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. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Worthington Water Supply?
EPA lists Worthington Water Supply as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 22 of the 74 active systems in Dubuque County (30%) are also owned by a local government.
Does Worthington Water Supply have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2001. By type: 1 monitoring and reporting. The contaminant or rule involved is Arsenic. EPA lists 1 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 |
|---|---|---|---|---|
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
The one violation in EPA's records. 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.
Worthington Water Supply: frequently asked questions
Who runs Worthington Water Supply?
Worthington Water Supply (PWSID IA3189001) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Worthington Water Supply serve?
Worthington Water Supply reports serving 382 people through 187 service connections in Dubuque County, Iowa.
Where does Worthington Water Supply 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 Worthington Water Supply have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2001. 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 Worthington Water Supply'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 one violation for this system; it is not health-based, and the most recent began in April 2001. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Worthington Water Supply's water quality report?
As a community water system, Worthington Water Supply 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 Dubuque County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dubuque Water Works | Dubuque | 59,667 | Community | Groundwater |
| Asbury Municipal Water System | Dubuque | 5,943 | Community | Groundwater |
| Dyersville Municipal Water Co | Dubuque | 4,477 | Community | Groundwater |
| John Deere Dubuque Works | Dubuque | 3,000 | Non-transient non-community | Groundwater |
| Cascade Municipal Water Supply | Dubuque | 2,386 | Community | Groundwater |
| Peosta Water Supply | Dubuque | 2,278 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Worthington Water Supply, PWSID IA3189001, Iowa”, https://aquacensus.com/water-systems/iowa/worthington-water-supply-ia3189001 (data as of October 1, 2026).