Public water system · IA9147047
ActiveMartensdale Water Supply
At a glance
Martensdale Water Supply (PWSID IA9147047) is an active community water system in Warren County, Iowa. It reports serving 421 people through 203 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 1998.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
421
Service connections
203
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Martensdale Water Supply compare with other water systems in Warren County?
By EPA's size categories, Martensdale Water Supply is a very small system (500 people or fewer). Warren County has 14 active public water systems. Its population served is well below the county average of 4,106 people per system, and accounts for 0.7% of the 57,488 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 Martensdale 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 119 Iowa systems (6.5%) list purchased surface water as their primary source.
Who owns and regulates Martensdale Water Supply?
EPA lists Martensdale 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. 8 of the 14 active systems in Warren County (57%) are also owned by a local government.
Does Martensdale Water Supply have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 1998. The violations listed here began between November 1995 and May 1998. By type: 1 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 1998-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
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.
Martensdale Water Supply: frequently asked questions
Who runs Martensdale Water Supply?
Martensdale Water Supply (PWSID IA9147047) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Martensdale Water Supply serve?
Martensdale Water Supply reports serving 421 people through 203 service connections in Warren County, Iowa.
Where does Martensdale Water Supply get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Martensdale Water Supply have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 1998. 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 Martensdale 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; 1 is health-based, and the most recent began in May 1998. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Martensdale Water Supply's water quality report?
As a community water system, Martensdale 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 Warren County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Warren Water District | Warren + 1 more | 20,095 | Community | Purchased surface water |
| Indianola Water Supply | Warren | 15,833 | Community | Groundwater |
| Norwalk Water Supply | Warren | 14,334 | Community | Purchased surface water |
| Carlisle Water Supply | Warren | 4,170 | Community | Groundwater |
| Milo Public Water Supply | Warren | 788 | Community | Purchased surface water |
| New Virginia Water Supply | Warren | 498 | 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, “Martensdale Water Supply, PWSID IA9147047, Iowa”, https://aquacensus.com/water-systems/iowa/martensdale-water-supply-ia9147047 (data as of October 1, 2026).