Public water system · IA7239086
ActiveOcheyedan Water Works
At a glance
Ocheyedan Water Works (PWSID IA7239086) is an active community water system in Osceola County, Iowa. It reports serving 439 people through 261 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
439
Service connections
261
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Ocheyedan Water Works compare with other water systems in Osceola County?
By EPA's size categories, Ocheyedan Water Works is a very small system (500 people or fewer). Osceola County has 7 active public water systems, and Ocheyedan Water Works is the 5th-largest of them by population served. Its population served is well below the county average of 1,889 people per system, and accounts for 3.3% of the 13,222 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 Ocheyedan Water Works is well 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 Ocheyedan Water Works?
EPA lists Ocheyedan Water Works 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. 5 of the 7 active systems in Osceola County (71%) are also owned by a local government.
Does Ocheyedan Water Works have drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in July 2025. The violations listed here began between January 1980 and July 2025. By type: 2 public notice, recordkeeping or other, 2 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 3 as archived, 2 as resolved and 1 as unaddressed. 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. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1993-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Archived |
| 1985-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1980-01-25 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Archived |
All 6 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.
Ocheyedan Water Works: frequently asked questions
Who runs Ocheyedan Water Works?
Ocheyedan Water Works (PWSID IA7239086) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Ocheyedan Water Works serve?
Ocheyedan Water Works reports serving 439 people through 261 service connections in Osceola County, Iowa.
Where does Ocheyedan Water Works 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 Ocheyedan Water Works have any drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in July 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 Ocheyedan Water Works' 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 6 violations for this system; 2 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Ocheyedan Water Works' water quality report?
As a community water system, Ocheyedan Water Works 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 Osceola County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Osceola Rural Water System-North | Osceola | 7,002 | Community | Groundwater |
| Sibley Public Water Supply | Osceola | 2,860 | Community | Purchased groundwater |
| Osceola Rural Water System-South | Osceola | 2,112 | Community | Groundwater |
| Ashton Municipal Water Department | Osceola | 456 | Community | Purchased groundwater |
| Melvin Waterworks | Osceola | 202 | Community | Purchased groundwater |
| Harris Water Supply | Osceola | 151 | Community | Purchased 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, “Ocheyedan Water Works, PWSID IA7239086, Iowa”, https://aquacensus.com/water-systems/iowa/ocheyedan-water-works-ia7239086 (data as of October 1, 2026).