Public water system · MO5182118
ActiveSouthwest Treatment Plant
At a glance
Southwest Treatment Plant (PWSID MO5182118) is an active non-transient non-community water system in Greene County, Missouri. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Southwest Treatment Plant compare with other water systems in Greene County?
By EPA's size categories, Southwest Treatment Plant is a very small system (500 people or fewer). Greene County has 81 active public water systems. Its population served is well below the county average of 3,276 people per system, and accounts for less than 0.1% of the 265,346 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 Southwest Treatment Plant is well below 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 Southwest Treatment Plant?
EPA lists Southwest Treatment Plant as owned by a local 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. 17 of the 81 active systems in Greene County (21%) are also owned by a local government.
Does Southwest Treatment Plant have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in July 2024. The violations listed here began between August 2011 and July 2024. By type: 2 monitoring and reporting, 1 reporting 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 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 |
|---|---|---|---|---|
| 2024-07-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-10-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2014-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-08-01 | 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.
Southwest Treatment Plant: frequently asked questions
Who runs Southwest Treatment Plant?
Southwest Treatment Plant (PWSID MO5182118) is a non-transient non-community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Southwest Treatment Plant serve?
Southwest Treatment Plant reports serving 50 people through 1 service connection in Greene County, Missouri.
Where does Southwest Treatment Plant 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 Southwest Treatment Plant have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in July 2024. 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 Southwest Treatment Plant'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; 1 is health-based, and the most recent began in July 2024. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Southwest Treatment Plant's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Southwest Treatment Plant 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 Greene County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City Utilities of Springfield | Greene | 210,898 | Community | Surface water |
| Republic Pws | Greene | 16,100 | Community | Groundwater |
| Greene County Pwsd 1 | Greene | 9,168 | Community | Groundwater |
| Willard Pws | Greene | 8,400 | Community | Groundwater |
| Strafford Pws | Greene | 2,600 | Community | Groundwater |
| Kum & Go 498 | Greene | 1,600 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Southwest Treatment Plant, PWSID MO5182118, Missouri”, https://aquacensus.com/water-systems/missouri/southwest-treatment-plant-mo5182118 (data as of October 1, 2026).