Public water system · IA6342036
ActiveKnoxville Water Works
At a glance
Knoxville Water Works (PWSID IA6342036) is an active community water system in Marion County, Iowa. It reports serving 8,400 people through 3,510 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 July 1992.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,400
Service connections
3,510
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Knoxville Water Works compare with other water systems in Marion County?
By EPA's size categories, Knoxville Water Works is a medium system (3,301 to 10,000 people). Marion County has 13 active public water systems, and Knoxville Water Works is the 2nd-largest of them by population served. Its population served is about 3.6 times the county average of 2,325 people per system, and accounts for 28% of the 30,229 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 Knoxville Water Works is about 25% above 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 Knoxville Water Works?
EPA lists Knoxville Water Works 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. 7 of the 13 active systems in Marion County (54%) are also owned by a local government.
Does Knoxville Water Works have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 1992. The violations listed here began between July 1983 and July 1992. By type: 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Lead and Copper Rule and Combined Radium (-226 and -228). EPA lists 1 as resolved and 1 as archived. 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. 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 |
|---|---|---|---|---|
| 1992-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1983-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | 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.
Knoxville Water Works: frequently asked questions
Who runs Knoxville Water Works?
Knoxville Water Works (PWSID IA6342036) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Knoxville Water Works serve?
Knoxville Water Works reports serving 8,400 people through 3,510 service connections in Marion County, Iowa.
Where does Knoxville Water Works 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 Knoxville Water Works have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 1992. 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 Knoxville Water Works' 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 July 1992. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Knoxville Water Works' water quality report?
As a community water system, Knoxville Water Works 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 Marion County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pella Water Works Department | Marion | 11,052 | Community | Groundwater |
| Marion Co. Rural Water District | Marion | 5,687 | Community | Purchased groundwater |
| Pleasantville Water Works | Marion | 1,676 | Community | Groundwater |
| Melcher-Dallas Water Supply | Marion | 1,213 | Community | Groundwater |
| Irua - Pershing Utilities | Marion | 488 | Community | Purchased groundwater |
| Bussey Water Supply | Marion | 427 | 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, “Knoxville Water Works, PWSID IA6342036, Iowa”, https://aquacensus.com/water-systems/iowa/knoxville-water-works-ia6342036 (data as of October 1, 2026).