Public water system · IA1320039
ActiveFarnhamville Water Supply
At a glance
Farnhamville Water Supply (PWSID IA1320039) is an active community water system in Calhoun County, Iowa. It reports serving 379 people through 203 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; all are health-based, and the most recent began in October 1984.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
379
Service connections
203
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Farnhamville Water Supply compare with other water systems in Calhoun County?
By EPA's size categories, Farnhamville Water Supply is a very small system (500 people or fewer). Calhoun County has 14 active public water systems, and Farnhamville Water Supply is the 6th-largest of them by population served. Its population served is about 34% below the county average of 572 people per system, and accounts for 4.7% of the 8,014 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 Farnhamville 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 Farnhamville Water Supply?
EPA lists Farnhamville 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. 12 of the 14 active systems in Calhoun County (86%) are also owned by a local government.
Does Farnhamville Water Supply have drinking water violations?
EPA's records list 4 violations for this system; all are health-based, and the most recent began in October 1984. The violations listed here began between December 1979 and October 1984. By type: 4 contaminant level above the legal limit. The contaminant or rule involved most often is Fluoride (4 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 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 | Fluoridecode 1025 | Yes | Archived |
| 1979-12-20 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Archived |
| 1979-12-19 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Archived |
All 4 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.
Farnhamville Water Supply: frequently asked questions
Who runs Farnhamville Water Supply?
Farnhamville Water Supply (PWSID IA1320039) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Farnhamville Water Supply serve?
Farnhamville Water Supply reports serving 379 people through 203 service connections in Calhoun County, Iowa.
Where does Farnhamville 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 Farnhamville Water Supply have any drinking water violations?
EPA's records list 4 violations for this system; all are health-based, and the most recent began in October 1984. 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 Farnhamville 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 4 violations for this system; all are health-based, and the most recent began in October 1984. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Farnhamville Water Supply's water quality report?
As a community water system, Farnhamville 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 Calhoun County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rockwell City Water Supply | Calhoun | 2,250 | Community | Groundwater |
| Lake City Water Supply | Calhoun | 1,731 | Community | Groundwater |
| Manson Water Supply | Calhoun | 1,709 | Community | Groundwater |
| Pomeroy Water Supply | Calhoun | 671 | Community | Groundwater |
| Lohrville Water Supply | Calhoun | 381 | Community | Groundwater |
| Twin Lakes Utilities | Calhoun | 300 | Community | Purchased 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, “Farnhamville Water Supply, PWSID IA1320039, Iowa”, https://aquacensus.com/water-systems/iowa/farnhamville-water-supply-ia1320039 (data as of October 1, 2026).