Public water system · IA6950075
ActiveRed Oak Water Supply
At a glance
Red Oak Water Supply (PWSID IA6950075) is an active community water system in Montgomery County, Iowa. It reports serving 5,596 people through 2,702 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,596
Service connections
2,702
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Red Oak Water Supply compare with other water systems in Montgomery County?
By EPA's size categories, Red Oak Water Supply is a medium system (3,301 to 10,000 people). Montgomery County has 5 active public water systems, and Red Oak Water Supply is the largest of them by population served. Its population served is about 149% above the county average of 2,251 people per system, and accounts for 50% 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 Red Oak Water Supply is about 17% below 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 Red Oak Water Supply?
EPA lists Red Oak Water Supply as owned by a local government. 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. 4 of the 5 active systems in Montgomery County (80%) are also owned by a local government.
Does Red Oak Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2024. The violations listed here began between January 2009 and July 2024. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Nitrate (4 of them). EPA lists 12 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 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2018-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2014-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
The 12 most recent 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.
Red Oak Water Supply: frequently asked questions
Who runs Red Oak Water Supply?
Red Oak Water Supply (PWSID IA6950075) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Red Oak Water Supply serve?
Red Oak Water Supply reports serving 5,596 people through 2,702 service connections in Montgomery County, Iowa.
Where does Red Oak Water Supply 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 Red Oak Water Supply have any drinking water violations?
Of the 12 most recent violations in EPA's records, none 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 Red Oak Water Supply'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Red Oak Water Supply's water quality report?
As a community water system, Red Oak Water Supply 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 |
|---|---|---|---|---|
| Southwest Reg Water District (Red Oak) | Montgomery | 3,500 | 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, “Red Oak Water Supply, PWSID IA6950075, Iowa”, https://aquacensus.com/water-systems/iowa/red-oak-water-supply-ia6950075 (data as of October 1, 2026).