Public water system · MN5230103
ActiveNiagara Cave, Inc..
At a glance
Niagara Cave, Inc.. (PWSID MN5230103) is an active transient non-community water system in Fillmore County, Minnesota. It reports serving 150 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; all are health-based, and the most recent began in September 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Niagara Cave, Inc.. compare with other water systems in Fillmore County?
By EPA's size categories, Niagara Cave, Inc.. is a very small system (500 people or fewer). Fillmore County has 59 active public water systems. Its population served is about half of the county average of 294 people per system, and accounts for 0.9% of the 17,338 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Niagara Cave, Inc.. is roughly in line with 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. Minnesota has 5,008 active transient non-community water systems, 77% of the state's 6,465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates Niagara Cave, Inc..?
EPA lists Niagara Cave, Inc.. as privately owned. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 39 of the 59 active systems in Fillmore County (66%) are also privately owned.
Does Niagara Cave, Inc.. have drinking water violations?
EPA's records list 4 violations for this system; all are health-based, and the most recent began in September 2007. The violations listed here began between September 2003 and September 2007. By type: 4 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2007-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2004-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 4 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.
Niagara Cave, Inc..: frequently asked questions
Who runs Niagara Cave, Inc..?
Niagara Cave, Inc.. (PWSID MN5230103) is a transient non-community water system privately owned. It is regulated by the MN state drinking water program.
How many people does Niagara Cave, Inc.. serve?
Niagara Cave, Inc.. reports serving 150 people through 1 service connection in Fillmore County, Minnesota.
Where does Niagara Cave, Inc.. 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 Niagara Cave, Inc.. have any drinking water violations?
EPA's records list 4 violations for this system; all are health-based, and the most recent began in September 2007. 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 Niagara Cave, Inc..'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 4 violations for this system; all are health-based, and the most recent began in September 2007. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find Niagara Cave, Inc..'s water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Niagara Cave, Inc.. 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 Fillmore County
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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, “Niagara Cave, Inc.., PWSID MN5230103, Minnesota”, https://aquacensus.com/water-systems/minnesota/niagara-cave-inc-mn5230103 (data as of October 1, 2026).