Public water system · MS0370001
ActiveArnold Line Water Association
At a glance
Arnold Line Water Association (PWSID MS0370001) is an active community water system in Lamar County, Mississippi. It reports serving 6,600 people through 2,500 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,600
Service connections
2,500
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Arnold Line Water Association compare with other water systems in Lamar County?
By EPA's size categories, Arnold Line Water Association is a medium system (3,301 to 10,000 people). Lamar County has 11 active public water systems, and Arnold Line Water Association is the 5th-largest of them by population served. Its population served is about 14% above the county average of 5,789 people per system, and accounts for 10% of the 63,678 people reported by systems filed under the county. Across Mississippi, the 1,133 active systems average 2,832 people each. Nationally, the average active community water system reports serving 6,703 people, so Arnold Line Water Association is roughly in line with 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. Mississippi has 947 active community water systems, 84% of the state's 1,133 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,053 Mississippi systems (93%) list groundwater as their primary source.
Who owns and regulates Arnold Line Water Association?
EPA lists Arnold Line Water Association as under public/private ownership. The MS state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 11 active systems in Lamar County (55%) are also under public/private ownership.
Does Arnold Line Water Association have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2024. The violations listed here began between October 2012 and January 2024. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Combined Uranium (3 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | 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.
Arnold Line Water Association: frequently asked questions
Who runs Arnold Line Water Association?
Arnold Line Water Association (PWSID MS0370001) is a community water system under public/private ownership. It is regulated by the MS state drinking water program.
How many people does Arnold Line Water Association serve?
Arnold Line Water Association reports serving 6,600 people through 2,500 service connections in Lamar County, Mississippi.
Where does Arnold Line Water Association 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 Arnold Line Water Association have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2024. 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 Arnold Line 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MS state drinking water program.
Where can I find Arnold Line Water Association's water quality report?
As a community water system, Arnold Line 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 Lamar County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| West Lamar Water Assn #1 | Lamar | 18,491 | Community | Groundwater |
| North Lamar Water Association | Lamar | 12,778 | Community | Groundwater |
| Lamar Park Water & Sewage Assn | Lamar | 7,714 | Community | Groundwater |
| Progress Comm Water Assn | Lamar | 7,017 | Community | Groundwater |
| North Lumberton Utility Assn | Lamar | 4,071 | Community | Groundwater |
| City of Purvis | Lamar | 2,590 | 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, “Arnold Line Water Association, PWSID MS0370001, Mississippi”, https://aquacensus.com/water-systems/mississippi/arnold-line-water-association-ms0370001 (data as of October 1, 2026).