Public water system · AR0000102
ActiveLocust Bayou Water Association
At a glance
Locust Bayou Water Association (PWSID AR0000102) is an active community water system in Calhoun County, Arkansas. It reports serving 531 people through 200 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in September 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
531
Service connections
200
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Locust Bayou Water Association compare with other water systems in Calhoun County?
By EPA's size categories, Locust Bayou Water Association is a small system (501 to 3,300 people). Calhoun County has 7 active public water systems, and Locust Bayou Water Association is the 5th-largest of them by population served. Its population served is about 45% below the county average of 965 people per system, and accounts for 7.9% of the 6,758 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 Locust Bayou Water Association 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 groundwater means the system buys groundwater from another public water system rather than drawing its own. 69 Arkansas systems (8.1%) list purchased groundwater as their primary source.
Who owns and regulates Locust Bayou Water Association?
EPA lists Locust Bayou Water Association 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. 5 of the 7 active systems in Calhoun County (71%) are also owned by a local government.
Does Locust Bayou Water Association have drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in September 2025. The violations listed here began between September 2000 and September 2025. By type: 3 monitoring and reporting, 3 contaminant level above the legal limit, 2 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2025-09-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-09-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2014-05-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
Locust Bayou Water Association: frequently asked questions
Who runs Locust Bayou Water Association?
Locust Bayou Water Association (PWSID AR0000102) is a community water system owned by a local government. It is regulated by the AR state drinking water program.
How many people does Locust Bayou Water Association serve?
Locust Bayou Water Association reports serving 531 people through 200 service connections in Calhoun County, Arkansas.
Where does Locust Bayou Water Association get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Locust Bayou Water Association have any drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in September 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 Locust Bayou Water Association'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 9 violations for this system; 3 are health-based, and the most recent began in September 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 Locust Bayou Water Association's water quality report?
As a community water system, Locust Bayou Water Association 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 Calhoun County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hampton Waterworks | Calhoun | 1,906 | Community | Groundwater |
| Calhoun County Water Assn | Calhoun | 1,591 | Community | Groundwater |
| Shumaker Public Service Co | Calhoun | 1,399 | Community | Groundwater |
| Thornton Waterworks | Calhoun | 900 | Community | Groundwater |
| Harrell Waterworks | Calhoun | 296 | Community | Groundwater |
| Georgia Pacific Wood Products LLC | Calhoun | 135 | Non-transient non-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, “Locust Bayou Water Association, PWSID AR0000102, Arkansas”, https://aquacensus.com/water-systems/arkansas/locust-bayou-water-association-ar0000102 (data as of October 1, 2026).