Public water system · AR0000287
ActiveKnoxville Waterworks
At a glance
Knoxville Waterworks (PWSID AR0000287) is an active community water system in Johnson County, Arkansas. It reports serving 2,087 people through 827 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; none is health-based, and the most recent began in September 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,087
Service connections
827
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Knoxville Waterworks compare with other water systems in Johnson County?
By EPA's size categories, Knoxville Waterworks is a small system (501 to 3,300 people). Johnson County has 11 active public water systems, and Knoxville Waterworks is the 5th-largest of them by population served. Its population served is about 26% below the county average of 2,829 people per system, and accounts for 6.7% of the 31,123 people reported by systems filed under the county. Across Arkansas, the 853 active systems average 3,592 people each. Nationally, the average active community water system reports serving 6,703 people, so Knoxville Waterworks 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. Arkansas has 660 active community water systems, 77% of the state's 853 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 237 Arkansas systems (28%) list purchased surface water as their primary source.
Who owns and regulates Knoxville Waterworks?
EPA lists Knoxville Waterworks as owned by a local government. The AR state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 11 active systems in Johnson County (91%) are also owned by a local government.
Does Knoxville Waterworks have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in September 1994. The violations listed here began between September 1994 and September 1994. By type: 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Surface Water Treatment Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 1994-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1994-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Surface Water Treatment Rulecode 0200 | No | 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 Waterworks: frequently asked questions
Who runs Knoxville Waterworks?
Knoxville Waterworks (PWSID AR0000287) is a community water system owned by a local government. It is regulated by the AR state drinking water program.
How many people does Knoxville Waterworks serve?
Knoxville Waterworks reports serving 2,087 people through 827 service connections in Johnson County, Arkansas.
Where does Knoxville Waterworks 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 Knoxville Waterworks have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in September 1994. 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 Waterworks' 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; none is health-based, and the most recent began in September 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the AR state drinking water program.
Where can I find Knoxville Waterworks' water quality report?
As a community water system, Knoxville Waterworks 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 Johnson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Clarksville Connected Utilities | Johnson | 9,410 | Community | Surface water |
| Horsehead Water Association | Johnson + 1 more | 5,792 | Community | Purchased surface water |
| East Johnson Co Water Assn | Johnson + 1 more | 5,200 | Community | Purchased surface water |
| Watalula Water Ass0ciation | Johnson + 1 more | 2,278 | Community | Purchased surface water |
| Lamar Waterworks | Johnson | 1,885 | Community | Purchased surface water |
| Ludwig Water Association | Johnson | 1,610 | 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, “Knoxville Waterworks, PWSID AR0000287, Arkansas”, https://aquacensus.com/water-systems/arkansas/knoxville-waterworks-ar0000287 (data as of October 1, 2026).