Public water system · IA3126941
ActiveSwiss Valley Nature Center
At a glance
Swiss Valley Nature Center (PWSID IA3126941) is an active transient non-community water system in Dubuque County, Iowa. It reports serving 363 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2003.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
363
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Swiss Valley Nature Center compare with other water systems in Dubuque County?
By EPA's size categories, Swiss Valley Nature Center 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 transient non-community water system reports serving 144 people, so Swiss Valley Nature Center is about 152% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Iowa has 626 active transient non-community water systems, 34% 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 Swiss Valley Nature Center?
EPA lists Swiss Valley Nature Center 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 Swiss Valley Nature Center have drinking water violations?
EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2003. The violations listed here began between October 1992 and July 2003. By type: 5 contaminant level above the legal limit and 5 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (10 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 |
|---|---|---|---|---|
| 2003-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-08-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-08-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Swiss Valley Nature Center: frequently asked questions
Who runs Swiss Valley Nature Center?
Swiss Valley Nature Center (PWSID IA3126941) is a transient non-community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Swiss Valley Nature Center serve?
Swiss Valley Nature Center reports serving 363 people through 2 service connections in Dubuque County, Iowa.
Where does Swiss Valley Nature Center 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 Swiss Valley Nature Center have any drinking water violations?
EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2003. 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 Swiss Valley Nature Center'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; 5 are health-based, and the most recent began in July 2003. For current results, consult EPA ECHO, or the IA state drinking water program.
Where can I find Swiss Valley Nature Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Swiss Valley Nature Center is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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 |
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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, “Swiss Valley Nature Center, PWSID IA3126941, Iowa”, https://aquacensus.com/water-systems/iowa/swiss-valley-nature-center-ia3126941 (data as of October 1, 2026).