Public water system · IA0330706
ActiveSpillway
At a glance
Spillway (PWSID IA0330706) is an active transient non-community water system in Allamakee County, Iowa. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Spillway compare with other water systems in Allamakee County?
By EPA's size categories, Spillway is a very small system (500 people or fewer). Allamakee County has 34 active public water systems. Its population served is well below the county average of 306 people per system, and accounts for 0.5% of the 10,414 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 Spillway is about 65% below 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 Spillway?
EPA lists Spillway as privately owned. 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. 28 of the 34 active systems in Allamakee County (82%) are also privately owned.
Does Spillway have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2005. The violations listed here began between August 1992 and September 2005. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Nitrate (6 of them). EPA lists 11 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2005-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1994-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-12-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-11-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-08-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The 12 most recent 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.
Spillway: frequently asked questions
Who runs Spillway?
Spillway (PWSID IA0330706) is a transient non-community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Spillway serve?
Spillway reports serving 50 people through 1 service connection in Allamakee County, Iowa.
Where does Spillway 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 Spillway have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2005. 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 Spillway'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2005. For current results, consult EPA ECHO, or the IA state drinking water program.
Where can I find Spillway's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Spillway 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 Allamakee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Waukon Water Department | Allamakee | 3,827 | Community | Groundwater |
| Postville Water Department | Allamakee | 2,513 | Community | Groundwater |
| Lansing Water Supply | Allamakee | 983 | Community | Groundwater |
| Agri Star Meat and Poultry LLC | Allamakee | 550 | Non-transient non-community | Groundwater |
| New Albin Water Supply | Allamakee | 432 | Community | Groundwater |
| Harpers Ferry City Complex | Allamakee | 262 | Transient non-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, “Spillway, PWSID IA0330706, Iowa”, https://aquacensus.com/water-systems/iowa/spillway-ia0330706 (data as of October 1, 2026).