Public water system · IA2330036
ActiveDe Witt Water Supply
At a glance
De Witt Water Supply (PWSID IA2330036) is an active community water system in Clinton County, Iowa. It reports serving 5,514 people through 2,166 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; 2 are health-based, and the most recent began in August 2003.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,514
Service connections
2,166
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does De Witt Water Supply compare with other water systems in Clinton County?
By EPA's size categories, De Witt Water Supply is a medium system (3,301 to 10,000 people). Clinton County has 29 active public water systems, and De Witt Water Supply is the 2nd-largest of them by population served. Its population served is about 4 times the county average of 1,391 people per system, and accounts for 14% 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 De Witt Water Supply is about 18% 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 De Witt Water Supply?
EPA lists De Witt 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 De Witt Water Supply have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in August 2003. The violations listed here began between January 1988 and August 2003. By type: 2 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2003-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
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.
De Witt Water Supply: frequently asked questions
Who runs De Witt Water Supply?
De Witt Water Supply (PWSID IA2330036) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does De Witt Water Supply serve?
De Witt Water Supply reports serving 5,514 people through 2,166 service connections in Clinton County, Iowa.
Where does De Witt 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 De Witt Water Supply have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in August 2003. 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 De Witt 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; 2 are health-based, and the most recent began in August 2003. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find De Witt Water Supply's water quality report?
As a community water system, De Witt 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 |
| 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 |
| Delmar Water Supply | Clinton | 542 | 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, “De Witt Water Supply, PWSID IA2330036, Iowa”, https://aquacensus.com/water-systems/iowa/de-witt-water-supply-ia2330036 (data as of October 1, 2026).