Public water system · AR0000309
ActiveWalnut Ridge Waterworks
At a glance
Walnut Ridge Waterworks (PWSID AR0000309) is an active community water system in Lawrence County, Arkansas. It reports serving 5,823 people through 2,423 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,823
Service connections
2,423
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Walnut Ridge Waterworks compare with other water systems in Lawrence County?
By EPA's size categories, Walnut Ridge Waterworks is a medium system (3,301 to 10,000 people). Lawrence County has 11 active public water systems, and Walnut Ridge Waterworks is the 2nd-largest of them by population served. Its population served is about 3 times the county average of 1,935 people per system, and accounts for 27% of the 21,285 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 Walnut Ridge Waterworks is about 13% 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 Walnut Ridge Waterworks?
EPA lists Walnut Ridge 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. 11 of the 11 active systems in Lawrence County (100%) are also owned by a local government.
Does Walnut Ridge Waterworks have drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025. The violations listed here began between August 1991 and July 2025. By type: 3 monitoring, 2 public notice, recordkeeping or other, 2 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 5 as resolved and 3 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 |
|---|---|---|---|---|
| 2025-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 1993-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 8 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.
Walnut Ridge Waterworks: frequently asked questions
Who runs Walnut Ridge Waterworks?
Walnut Ridge Waterworks (PWSID AR0000309) is a community water system owned by a local government. It is regulated by the AR state drinking water program.
How many people does Walnut Ridge Waterworks serve?
Walnut Ridge Waterworks reports serving 5,823 people through 2,423 service connections in Lawrence County, Arkansas.
Where does Walnut Ridge 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 Walnut Ridge Waterworks have any drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025. 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 Walnut Ridge 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 8 violations for this system; 2 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the AR state drinking water program.
Where can I find Walnut Ridge Waterworks' water quality report?
As a community water system, Walnut Ridge 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 Lawrence County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lawrence Co Reg Water Dist | Lawrence + 2 more | 7,469 | Community | Purchased surface water |
| Hoxie Water Department | Lawrence | 2,666 | Community | Purchased surface water |
| Strawberry Waterworks | Lawrence | 1,093 | Community | Groundwater |
| Black Rock Waterworks | Lawrence | 1,034 | Community | Groundwater |
| Imboden Waterworks | Lawrence | 825 | Community | Groundwater |
| Lynn Waterworks | Lawrence | 773 | 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, “Walnut Ridge Waterworks, PWSID AR0000309, Arkansas”, https://aquacensus.com/water-systems/arkansas/walnut-ridge-waterworks-ar0000309 (data as of October 1, 2026).