Public water system · IA7872062
ActiveWalnut Municipal Utilities
At a glance
Walnut Municipal Utilities (PWSID IA7872062) is an active community water system in Pottawattamie County, Iowa. It reports serving 768 people through 420 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, 7 are health-based, and the most recent began in July 2001.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
768
Service connections
420
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Walnut Municipal Utilities compare with other water systems in Pottawattamie County?
By EPA's size categories, Walnut Municipal Utilities is a small system (501 to 3,300 people). Pottawattamie County has 33 active public water systems. Its population served is well below the county average of 2,579 people per system, and accounts for 0.9% of the 85,108 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 Walnut 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. 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 Walnut Municipal Utilities?
EPA lists Walnut 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. 15 of the 33 active systems in Pottawattamie County (45%) are also owned by a local government.
Does Walnut Municipal Utilities have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in July 2001. The violations listed here began between August 1980 and July 2001. By type: 7 contaminant level above the legal limit and 5 monitoring and reporting. The contaminant or rule involved most often is Combined Radium (-226 and -228) (6 of them). EPA lists 9 as archived and 3 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2001-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2001-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1989-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 1985-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Archived |
| 1985-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1985-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
| 1984-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Archived |
| 1984-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | Archived |
| 1983-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Combined Radium (-226 and -228)code 4010 | Yes | Archived |
| 1983-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | Archived |
| 1981-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Archived |
| 1980-08-05 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | 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.
Walnut Municipal Utilities: frequently asked questions
Who runs Walnut Municipal Utilities?
Walnut Municipal Utilities (PWSID IA7872062) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Walnut Municipal Utilities serve?
Walnut Municipal Utilities reports serving 768 people through 420 service connections in Pottawattamie County, Iowa.
Where does Walnut Municipal Utilities 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 Walnut Municipal Utilities have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in July 2001. 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 Walnut 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, 7 are health-based, and the most recent began in July 2001. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Walnut Municipal Utilities' water quality report?
As a community water system, Walnut 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 Pottawattamie County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Council Bluffs Water Works | Pottawattamie | 64,447 | Community | Surface water |
| Regional Water | Pottawattamie + 1 more | 4,132 | Community | Purchased surface water |
| Carter Lake Water District | Pottawattamie | 3,791 | Community | Purchased surface water |
| Avoca Water Works | Pottawattamie | 1,697 | Community | Purchased groundwater |
| Urban Bluffs - North | Pottawattamie | 1,558 | Community | Purchased surface water |
| Oakland Munic Water Utility | Pottawattamie | 1,524 | 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, “Walnut Municipal Utilities, PWSID IA7872062, Iowa”, https://aquacensus.com/water-systems/iowa/walnut-municipal-utilities-ia7872062 (data as of October 1, 2026).