Public water system · MO6181967
ActiveSix Flags St Louis
At a glance
Six Flags St Louis (PWSID MO6181967) is an active non-transient non-community water system in St. Louis County, Missouri. It reports serving 3,200 people through 40 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,200
Service connections
40
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Six Flags St Louis compare with other water systems in St. Louis County?
By EPA's size categories, Six Flags St Louis is a small system (501 to 3,300 people). St. Louis County has 23 active public water systems, and Six Flags St Louis is the 3rd-largest of them by population served. Its population served is well below the county average of 49,800 people per system, and accounts for 0.3% 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 non-transient non-community water system reports serving 430 people, so Six Flags St Louis is about 7.4 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Missouri has 228 active non-transient non-community water systems, 7.7% 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 Six Flags St Louis?
EPA lists Six Flags St Louis 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 Six Flags St Louis have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2022. The violations listed here began between April 1993 and February 2022. By type: 2 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2022-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2010-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
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.
Six Flags St Louis: frequently asked questions
Who runs Six Flags St Louis?
Six Flags St Louis (PWSID MO6181967) is a non-transient non-community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Six Flags St Louis serve?
Six Flags St Louis reports serving 3,200 people through 40 service connections in St. Louis County, Missouri.
Where does Six Flags St Louis 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 Six Flags St Louis have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2022. 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 Six Flags St Louis' 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; 1 is health-based, and the most recent began in February 2022. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Six Flags St Louis' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Six Flags St Louis is a non-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 |
| 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 |
| Mo American Pevely Farms | St. Louis | 343 | 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, “Six Flags St Louis, PWSID MO6181967, Missouri”, https://aquacensus.com/water-systems/missouri/six-flags-st-louis-mo6181967 (data as of October 1, 2026).