Public water system · IA2328024
ActiveDelmar Water Supply
At a glance
Delmar Water Supply (PWSID IA2328024) is an active community water system in Clinton County, Iowa. It reports serving 542 people through 218 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; 1 is health-based, and the most recent began in January 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
542
Service connections
218
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Delmar Water Supply compare with other water systems in Clinton County?
By EPA's size categories, Delmar Water Supply is a small system (501 to 3,300 people). Clinton County has 29 active public water systems. Its population served is about 61% below the county average of 1,391 people per system, and accounts for 1.3% of the 40,325 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 Delmar 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 Delmar Water Supply?
EPA lists Delmar 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. 13 of the 29 active systems in Clinton County (45%) are also owned by a local government.
Does Delmar 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 January 2018. The violations listed here began between October 1988 and January 2018. By type: 1 required treatment not met and 1 monitoring and reporting. The contaminants or rules involved are Groundwater Rule and Gross alpha (excluding radon and uranium). 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 |
|---|---|---|---|---|
| 2018-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 1988-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | 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.
Delmar Water Supply: frequently asked questions
Who runs Delmar Water Supply?
Delmar Water Supply (PWSID IA2328024) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Delmar Water Supply serve?
Delmar Water Supply reports serving 542 people through 218 service connections in Clinton County, Iowa.
Where does Delmar 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 Delmar 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 January 2018. 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 Delmar 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 January 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Delmar Water Supply's water quality report?
As a community water system, Delmar 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 Clinton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Iowa-American Wtr Co-Clinton District | Clinton | 24,769 | Community | Groundwater |
| De Witt Water Supply | Clinton | 5,514 | Community | Groundwater |
| Camanche Water Supply | Clinton | 4,570 | Community | Groundwater |
| Wheatland City Water Supply | Clinton | 775 | Community | Groundwater |
| Equistar Chemicals Lp | Clinton | 715 | Non-transient non-community | Groundwater |
| Grand Mound Water Supply | Clinton | 615 | 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, “Delmar Water Supply, PWSID IA2328024, Iowa”, https://aquacensus.com/water-systems/iowa/delmar-water-supply-ia2328024 (data as of October 1, 2026).