Public water system · IA6950701
ActiveSouthwest Reg Water District (Red Oak)
At a glance
Southwest Reg Water District (Red Oak) (PWSID IA6950701) is an active community water system in Montgomery County, Iowa. It reports serving 3,500 people through 1,369 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 10 violations for this system; 6 are health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,500
Service connections
1,369
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Southwest Reg Water District (Red Oak) compare with other water systems in Montgomery County?
By EPA's size categories, Southwest Reg Water District (Red Oak) is a medium system (3,301 to 10,000 people). Montgomery County has 5 active public water systems, and Southwest Reg Water District (Red Oak) is the 2nd-largest of them by population served. Its population served is about 55% above the county average of 2,251 people per system, and accounts for 31% of the 11,256 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Southwest Reg Water District (Red Oak) is about half of that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Southwest Reg Water District (Red Oak)?
EPA lists Southwest Reg Water District (Red Oak) as privately owned. The IA 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 5 active systems in Montgomery County (20%) are also privately owned.
Does Southwest Reg Water District (Red Oak) have drinking water violations?
EPA's records list 10 violations for this system; 6 are health-based, and the most recent began in March 2026. The violations listed here began between November 2004 and March 2026. By type: 6 contaminant level above the legal limit, 2 monitoring and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2026-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2019-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2007-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2005-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2004-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 10 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 Reg Water District (Red Oak): frequently asked questions
Who runs Southwest Reg Water District (Red Oak)?
Southwest Reg Water District (Red Oak) (PWSID IA6950701) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Southwest Reg Water District (Red Oak) serve?
Southwest Reg Water District (Red Oak) reports serving 3,500 people through 1,369 service connections in Montgomery County, Iowa.
Where does Southwest Reg Water District (Red Oak) 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 Reg Water District (Red Oak) have any drinking water violations?
EPA's records list 10 violations for this system; 6 are health-based, and the most recent began in March 2026. 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 Reg Water District (Red Oak)'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 10 violations for this system; 6 are health-based, and the most recent began in March 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Southwest Reg Water District (Red Oak)'s water quality report?
As a community water system, Southwest Reg Water District (Red Oak) must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Montgomery County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Red Oak Water Supply | Montgomery | 5,596 | Community | Groundwater |
| Villisca Municipal Water Dept | Montgomery | 1,132 | Community | Groundwater |
| Stanton Water Supply | Montgomery | 683 | Transient non-community | Groundwater |
| Elliott Water Supply | Montgomery | 345 | 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, “Southwest Reg Water District (Red Oak), PWSID IA6950701, Iowa”, https://aquacensus.com/water-systems/iowa/southwest-reg-water-district-red-oak-ia6950701 (data as of October 1, 2026).