Public water system · IA6663001
ActiveOsage Municipal Water Supply
At a glance
Osage Municipal Water Supply (PWSID IA6663001) is an active community water system in Mitchell County, Iowa. It reports serving 3,637 people through 1,952 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, 9 are health-based, and the most recent began in June 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,637
Service connections
1,952
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Osage Municipal Water Supply compare with other water systems in Mitchell County?
By EPA's size categories, Osage Municipal Water Supply is a medium system (3,301 to 10,000 people). Mitchell County has 16 active public water systems, and Osage Municipal Water Supply is the largest of them by population served. Its population served is about 9.5 times the county average of 382 people per system, and accounts for 60% of the 6,105 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 Osage Municipal Water Supply 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 Osage Municipal Water Supply?
EPA lists Osage Municipal 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. 8 of the 16 active systems in Mitchell County (50%) are also owned by a local government.
Does Osage Municipal Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in June 2016. The violations listed here began between October 1991 and June 2016. By type: 9 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 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 |
|---|---|---|---|---|
| 2016-06-12 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2009-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2002-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1997-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1991-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Osage Municipal Water Supply: frequently asked questions
Who runs Osage Municipal Water Supply?
Osage Municipal Water Supply (PWSID IA6663001) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Osage Municipal Water Supply serve?
Osage Municipal Water Supply reports serving 3,637 people through 1,952 service connections in Mitchell County, Iowa.
Where does Osage Municipal 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 Osage Municipal Water Supply have any drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in June 2016. 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 Osage Municipal 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, 9 are health-based, and the most recent began in June 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Osage Municipal Water Supply's water quality report?
As a community water system, Osage Municipal 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 Mitchell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| St Ansgar Water Supply | Mitchell | 1,161 | Community | Groundwater |
| Stacyville Water Supply | Mitchell | 465 | Community | Groundwater |
| St Peter Lutheran Church | Mitchell | 188 | Transient non-community | Groundwater |
| Old County Seat Bar & Grill | Mitchell | 101 | Transient non-community | Groundwater |
| Absolute Energy LLC | Mitchell | 70 | Non-transient non-community | Groundwater |
| Orchard Water Works | Mitchell | 68 | 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, “Osage Municipal Water Supply, PWSID IA6663001, Iowa”, https://aquacensus.com/water-systems/iowa/osage-municipal-water-supply-ia6663001 (data as of October 1, 2026).