Public water system · IA2740050
ActiveLamoni Municipal Utilities
At a glance
Lamoni Municipal Utilities (PWSID IA2740050) is an active community water system in Decatur County, Iowa. It reports serving 2,029 people through 913 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,029
Service connections
913
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Lamoni Municipal Utilities compare with other water systems in Decatur County?
By EPA's size categories, Lamoni Municipal Utilities is a small system (501 to 3,300 people). Decatur County has 5 active public water systems, and Lamoni Municipal Utilities is the 2nd-largest of them by population served. Its population served is well below the county average of 7,682 people per system, and accounts for 5.3% of the 38,411 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 Lamoni Municipal Utilities 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 24 Iowa systems (1.3%) list surface water as their primary source.
Who owns and regulates Lamoni Municipal Utilities?
EPA lists Lamoni Municipal Utilities 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. 3 of the 5 active systems in Decatur County (60%) are also owned by a local government.
Does Lamoni Municipal Utilities have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 2025. The violations listed here began between October 2016 and March 2025. By type: 10 monitoring and reporting, 1 required treatment not met and 1 monitoring. The contaminant or rule involved most often is Carbon, total (3 of them). EPA lists 10 as resolved and 2 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 |
|---|---|---|---|---|
| 2025-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2023-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorine dioxidecode 1008 | No | Resolved |
| 2023-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chloritecode 1009 | No | Resolved |
| 2022-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chloritecode 1009 | No | Resolved |
| 2022-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
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.
Lamoni Municipal Utilities: frequently asked questions
Who runs Lamoni Municipal Utilities?
Lamoni Municipal Utilities (PWSID IA2740050) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Lamoni Municipal Utilities serve?
Lamoni Municipal Utilities reports serving 2,029 people through 913 service connections in Decatur County, Iowa.
Where does Lamoni Municipal Utilities get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Lamoni Municipal Utilities have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in March 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 Lamoni Municipal Utilities' 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, one is health-based, and the most recent began in March 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 Lamoni Municipal Utilities' water quality report?
As a community water system, Lamoni Municipal Utilities 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 Decatur County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rathbun Regional Water Assn (Rathbun) | Decatur + 7 more | 33,000 | Community | Surface water |
| Leon Water Supply | Decatur | 1,830 | Community | Surface water |
| Sirwa #3 (Leon) | Decatur | 1,373 | Community | Purchased surface water |
| Garden Grove Water Supply | Decatur | 179 | Community | Purchased surface water |
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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, “Lamoni Municipal Utilities, PWSID IA2740050, Iowa”, https://aquacensus.com/water-systems/iowa/lamoni-municipal-utilities-ia2740050 (data as of October 1, 2026).