Public water system · MO6281482
ActiveMarianist Retreat Center
At a glance
Marianist Retreat Center (PWSID MO6281482) is an active transient non-community water system in St. Louis County, Missouri. 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, 8 are health-based, and the most recent began in June 2023.
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 Marianist Retreat Center compare with other water systems in St. Louis County?
By EPA's size categories, Marianist Retreat Center is a very small system (500 people or fewer). St. Louis County has 23 active public water systems. Its population served is well below the county average of 49,800 people per system, and accounts for less than 0.1% of the 1,145,404 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Marianist Retreat Center 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. Missouri has 1,103 active transient non-community water systems, 37% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.
Who owns and regulates Marianist Retreat Center?
EPA lists Marianist Retreat Center as privately owned. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 15 of the 23 active systems in St. Louis County (65%) are also privately owned.
Does Marianist Retreat Center have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in June 2023. The violations listed here began between May 1998 and June 2023. By type: 7 contaminant level above the legal limit, 3 monitoring and reporting, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (10 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2023-06-08 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2023-04-14 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2002-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Marianist Retreat Center: frequently asked questions
Who runs Marianist Retreat Center?
Marianist Retreat Center (PWSID MO6281482) is a transient non-community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Marianist Retreat Center serve?
Marianist Retreat Center reports serving 25 people through 1 service connection in St. Louis County, Missouri.
Where does Marianist Retreat 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 Marianist Retreat Center have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in June 2023. 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 Marianist Retreat 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. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in June 2023. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Marianist Retreat Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Marianist Retreat 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 St. Louis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mo American St Louis St Charles Counties | St. Louis + 1 more | 1,111,000 | Community | Surface water |
| Kirkwood Pws | St. Louis | 28,000 | Community | Purchased surface water |
| Six Flags St Louis | St. Louis | 3,200 | Non-transient non-community | Groundwater |
| Mo Eastern Correctional Center | St. Louis | 1,100 | Community | Groundwater |
| Rockwoods Reservation | St. Louis | 550 | Transient non-community | Groundwater |
| Babler State Park | St. Louis | 500 | 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, “Marianist Retreat Center, PWSID MO6281482, Missouri”, https://aquacensus.com/water-systems/missouri/marianist-retreat-center-mo6281482 (data as of October 1, 2026).