Public water system · IA9427082
ActiveDuncombe Water Supply
At a glance
Duncombe Water Supply (PWSID IA9427082) is an active community water system in Webster County, Iowa. It reports serving 384 people through 178 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1981.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
384
Service connections
178
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Duncombe Water Supply compare with other water systems in Webster County?
By EPA's size categories, Duncombe Water Supply is a very small system (500 people or fewer). Webster County has 29 active public water systems. Its population served is well below the county average of 1,330 people per system, and accounts for 1% of the 38,572 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 Duncombe Water Supply 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 Duncombe Water Supply?
EPA lists Duncombe 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. 15 of the 29 active systems in Webster County (52%) are also owned by a local government.
Does Duncombe Water Supply have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1981. The violations listed here began between June 1980 and October 1981. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Fluoride (2 of them). EPA lists 2 as archived. 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 |
|---|---|---|---|---|
| 1981-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Archived |
| 1980-06-16 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Archived |
All 2 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.
Duncombe Water Supply: frequently asked questions
Who runs Duncombe Water Supply?
Duncombe Water Supply (PWSID IA9427082) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Duncombe Water Supply serve?
Duncombe Water Supply reports serving 384 people through 178 service connections in Webster County, Iowa.
Where does Duncombe 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 Duncombe Water Supply have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1981. 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 Duncombe 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. EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1981. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Duncombe Water Supply's water quality report?
As a community water system, Duncombe 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 Webster County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fort Dodge Water Supply | Webster | 25,874 | Community | Groundwater |
| Xenia Rwd (North) | Webster + 3 more | 6,122 | Community | Groundwater |
| Gowrie Muni Utilities Water Dept | Webster | 954 | Community | Groundwater |
| Dayton Municipal Water Supply | Webster | 772 | Community | Groundwater |
| Badger Water Supply | Webster | 561 | Community | Groundwater |
| Otho Water Supply | Webster | 431 | 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, “Duncombe Water Supply, PWSID IA9427082, Iowa”, https://aquacensus.com/water-systems/iowa/duncombe-water-supply-ia9427082 (data as of October 1, 2026).