Public water system · IA0315201
ActiveKnotty Marie'S
At a glance
Knotty Marie'S (PWSID IA0315201) is an active transient non-community water system in Allamakee County, Iowa. It reports serving 25 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 January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Knotty Marie'S compare with other water systems in Allamakee County?
By EPA's size categories, Knotty Marie'S 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 0.2% 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 Knotty Marie'S is well 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 Knotty Marie'S?
EPA lists Knotty Marie'S 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 Knotty Marie'S have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2026. The violations listed here began between April 1994 and January 2026. By type: 7 monitoring and reporting, 3 public notice, recordkeeping or other and 2 monitoring. The contaminant or rule involved most often is Nitrate (4 of them). EPA lists 9 as resolved and 3 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-01-26 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2025-04-20 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-04-20 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2024-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-07-22 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2019-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2001-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-04-01 | 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.
Knotty Marie'S: frequently asked questions
Who runs Knotty Marie'S?
Knotty Marie'S (PWSID IA0315201) is a transient non-community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Knotty Marie'S serve?
Knotty Marie'S reports serving 25 people through 1 service connection in Allamakee County, Iowa.
Where does Knotty Marie'S 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 Knotty Marie'S 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 January 2026. 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 Knotty Marie'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 January 2026. For current results, consult EPA ECHO, or the IA state drinking water program.
Where can I find Knotty Marie'S' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Knotty Marie'S 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, “Knotty Marie'S, PWSID IA0315201, Iowa”, https://aquacensus.com/water-systems/iowa/knotty-marie-s-ia0315201 (data as of October 1, 2026).