Public water system · MO5248306
ActiveNiangua River Oasis
At a glance
Niangua River Oasis (PWSID MO5248306) is an active transient non-community water system in Dallas County, Missouri. It reports serving 200 people through 34 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; none is health-based, and the most recent began in September 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
34
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Niangua River Oasis compare with other water systems in Dallas County?
By EPA's size categories, Niangua River Oasis is a very small system (500 people or fewer). Dallas County has 17 active public water systems. Its population served is about half of the county average of 367 people per system, and accounts for 3.2% of the 6,244 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 Niangua River Oasis is about 39% above 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 Niangua River Oasis?
EPA lists Niangua River Oasis 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. 14 of the 17 active systems in Dallas County (82%) are also privately owned.
Does Niangua River Oasis have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in September 2013. The violations listed here began between December 1992 and September 2013. By type: 5 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2013-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 5 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.
Niangua River Oasis: frequently asked questions
Who runs Niangua River Oasis?
Niangua River Oasis (PWSID MO5248306) is a transient non-community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Niangua River Oasis serve?
Niangua River Oasis reports serving 200 people through 34 service connections in Dallas County, Missouri.
Where does Niangua River Oasis 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 Niangua River Oasis have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in September 2013. 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 Niangua River Oasis' 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 5 violations for this system; none is health-based, and the most recent began in September 2013. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Niangua River Oasis' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Niangua River Oasis 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 Dallas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Buffalo Pws | Dallas | 3,462 | Community | Groundwater |
| Danieldale Community Water Service | Dallas | 702 | Community | Purchased surface water |
| Urbana Pws | Dallas | 409 | Community | Groundwater |
| Meltons 64 73 Junction | Dallas | 300 | Transient non-community | Groundwater |
| Rivers Bend Campground | Dallas | 300 | Transient non-community | Groundwater |
| Prairie Grove School | Dallas | 245 | Non-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, “Niangua River Oasis, PWSID MO5248306, Missouri”, https://aquacensus.com/water-systems/missouri/niangua-river-oasis-mo5248306 (data as of October 1, 2026).