Public water system · MO4102202
ActiveOzark Natl River Big Spring
At a glance
Ozark Natl River Big Spring (PWSID MO4102202) is an active transient non-community water system in Carter County, Missouri. It reports serving 500 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
8
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Ozark Natl River Big Spring compare with other water systems in Carter County?
By EPA's size categories, Ozark Natl River Big Spring is a very small system (500 people or fewer). Carter County has 9 active public water systems, and Ozark Natl River Big Spring is the 4th-largest of them by population served. Its population served is about 21% above the county average of 415 people per system, and accounts for 13% of the 3,732 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 Ozark Natl River Big Spring is about 3.5 times 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 Ozark Natl River Big Spring?
EPA lists Ozark Natl River Big Spring as owned by the federal government. 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. 1 of the 9 active systems in Carter County (11%) are also owned by the federal government.
Does Ozark Natl River Big Spring have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 2025. The violations listed here began between December 2015 and August 2025. By type: 2 monitoring, 1 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 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 |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-02-03 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | 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.
Ozark Natl River Big Spring: frequently asked questions
Who runs Ozark Natl River Big Spring?
Ozark Natl River Big Spring (PWSID MO4102202) is a transient non-community water system owned by the federal government. It is regulated by the MO state drinking water program.
How many people does Ozark Natl River Big Spring serve?
Ozark Natl River Big Spring reports serving 500 people through 8 service connections in Carter County, Missouri.
Where does Ozark Natl River Big Spring 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 Ozark Natl River Big Spring have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 2025. 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 Ozark Natl River Big Spring'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; none is health-based, and the most recent began in August 2025. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Ozark Natl River Big Spring's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Ozark Natl River Big Spring 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 Carter County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Van Buren Pws | Carter | 819 | Community | Groundwater |
| Deer Run Reorganized Common Sewer Dist | Carter | 700 | Community | Purchased groundwater |
| Carter County Pwsd 1 | Carter | 600 | Community | Groundwater |
| Ellsinore Pws | Carter | 500 | Community | Groundwater |
| Grandin Pws | Carter | 240 | Community | Groundwater |
| Simmons Grocery & Hardware | Carter | 200 | 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, “Ozark Natl River Big Spring, PWSID MO4102202, Missouri”, https://aquacensus.com/water-systems/missouri/ozark-natl-river-big-spring-mo4102202 (data as of October 1, 2026).