Public water system · IA3353088
ActiveOelwein Municipal Water Works
At a glance
Oelwein Municipal Water Works (PWSID IA3353088) is an active community water system in Fayette County, Iowa. It reports serving 5,920 people through 2,900 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in April 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,920
Service connections
2,900
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Oelwein Municipal Water Works compare with other water systems in Fayette County?
By EPA's size categories, Oelwein Municipal Water Works is a medium system (3,301 to 10,000 people). Fayette County has 23 active public water systems, and Oelwein Municipal Water Works is the largest of them by population served. Its population served is about 9.3 times the county average of 634 people per system, and accounts for 41% of the 14,592 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 Oelwein Municipal Water Works is about 12% 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 Oelwein Municipal Water Works?
EPA lists Oelwein Municipal 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. 12 of the 23 active systems in Fayette County (52%) are also owned by a local government.
Does Oelwein Municipal Water Works have drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in April 2014. The violations listed here began between July 1992 and April 2014. By type: 6 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Tetrachloroethylene (3 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2014-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1992-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 8 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.
Oelwein Municipal Water Works: frequently asked questions
Who runs Oelwein Municipal Water Works?
Oelwein Municipal Water Works (PWSID IA3353088) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Oelwein Municipal Water Works serve?
Oelwein Municipal Water Works reports serving 5,920 people through 2,900 service connections in Fayette County, Iowa.
Where does Oelwein Municipal 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 Oelwein Municipal Water Works have any drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in April 2014. 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 Oelwein Municipal 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 8 violations for this system; 2 are health-based, and the most recent began in April 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Oelwein Municipal Water Works' water quality report?
As a community water system, Oelwein Municipal 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 Fayette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| West Union Water Supply | Fayette | 2,540 | Community | Groundwater |
| Fayette Water Supply | Fayette | 1,256 | Community | Groundwater |
| Elgin Municipal Water Supply | Fayette | 685 | Community | Groundwater |
| Clermont Water Supply | Fayette | 586 | Community | Groundwater |
| North Fayette Valley Community School | Fayette | 552 | Non-transient non-community | Groundwater |
| Maynard Water Supply | Fayette | 476 | 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, “Oelwein Municipal Water Works, PWSID IA3353088, Iowa”, https://aquacensus.com/water-systems/iowa/oelwein-municipal-water-works-ia3353088 (data as of October 1, 2026).