Public water system · AR0000504
ActiveGreenwood Waterworks
At a glance
Greenwood Waterworks (PWSID AR0000504) is an active community water system in Sebastian County, Arkansas. It reports serving 9,905 people through 3,922 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,905
Service connections
3,922
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Greenwood Waterworks compare with other water systems in Sebastian County?
By EPA's size categories, Greenwood Waterworks is a medium system (3,301 to 10,000 people). Sebastian County has 12 active public water systems, and Greenwood Waterworks is the 2nd-largest of them by population served. Its population served is roughly in line with the county average of 9,407 people per system, and accounts for 8.8% of the 112,887 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 Greenwood Waterworks is about 48% 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. Arkansas has 660 active community water systems, 77% of the state's 853 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 75 Arkansas systems (8.8%) list surface water as their primary source.
Who owns and regulates Greenwood Waterworks?
EPA lists Greenwood 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. 12 of the 12 active systems in Sebastian County (100%) are also owned by a local government.
Does Greenwood Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2023. The violations listed here began between July 2011 and February 2023. By type: 7 contaminant level above the legal limit, 3 monitoring and reporting, 1 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (7 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2023-02-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorine dioxidecode 1008 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorine dioxidecode 1008 | No | Resolved |
| 2022-06-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2011-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2011-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
The 12 most recent 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.
Greenwood Waterworks: frequently asked questions
Who runs Greenwood Waterworks?
Greenwood Waterworks (PWSID AR0000504) is a community water system owned by a local government. It is regulated by the AR state drinking water program.
How many people does Greenwood Waterworks serve?
Greenwood Waterworks reports serving 9,905 people through 3,922 service connections in Sebastian County, Arkansas.
Where does Greenwood Waterworks get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Greenwood Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2023. 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 Greenwood 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. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in February 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the AR state drinking water program.
Where can I find Greenwood Waterworks' water quality report?
As a community water system, Greenwood 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 Sebastian County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fort Smith Water Utilities | Sebastian | 86,209 | Community | Surface water |
| Barling Waterworks | Sebastian | 5,822 | Community | Purchased surface water |
| Lavaca Waterworks | Sebastian | 3,650 | Community | Purchased surface water |
| Mansfield Waterworks | Sebastian | 2,367 | Community | Purchased surface water |
| Central City Water Department | Sebastian | 1,227 | Community | Purchased surface water |
| Hackett Waterworks | Sebastian | 1,090 | 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, “Greenwood Waterworks, PWSID AR0000504, Arkansas”, https://aquacensus.com/water-systems/arkansas/greenwood-waterworks-ar0000504 (data as of October 1, 2026).