Public water system · MS0320015
ActiveMcnair-Stampley W/A #3
At a glance
Mcnair-Stampley W/A #3 (PWSID MS0320015) is an active community water system in Jefferson County, Mississippi. It reports serving 562 people through 213 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
562
Service connections
213
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mcnair-Stampley W/A #3 compare with other water systems in Jefferson County?
By EPA's size categories, Mcnair-Stampley W/A #3 is a small system (501 to 3,300 people). Jefferson County has 6 active public water systems, and Mcnair-Stampley W/A #3 is the 6th-largest of them by population served. Its population served is about 60% below the county average of 1,419 people per system, and accounts for 6.6% of the 8,516 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 Mcnair-Stampley W/A #3 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. 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 Mcnair-Stampley W/A #3?
EPA lists Mcnair-Stampley W/A #3 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. 5 of the 6 active systems in Jefferson County (83%) are also under public/private ownership.
Does Mcnair-Stampley W/A #3 have drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 2025. The violations listed here began between August 2015 and April 2025. By type: 5 monitoring and reporting, 1 monitoring, 1 reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Chlorine (3 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 |
|---|---|---|---|---|
| 2025-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2020-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2018-12-01 | ReportingReporting, Assessment Forms (RTCR) · code 4A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-07-21 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2015-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | 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.
Mcnair-Stampley W/A #3: frequently asked questions
Who runs Mcnair-Stampley W/A #3?
Mcnair-Stampley W/A #3 (PWSID MS0320015) is a community water system under public/private ownership. It is regulated by the MS state drinking water program.
How many people does Mcnair-Stampley W/A #3 serve?
Mcnair-Stampley W/A #3 reports serving 562 people through 213 service connections in Jefferson County, Mississippi.
Where does Mcnair-Stampley W/A #3 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 Mcnair-Stampley W/A #3 have any drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 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 Mcnair-Stampley W/A #3'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; 2 are health-based, and the most recent began in April 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MS state drinking water program.
Where can I find Mcnair-Stampley W/A #3's water quality report?
As a community water system, Mcnair-Stampley W/A #3 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 Jefferson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lorman Water Association | Jefferson | 2,162 | Community | Groundwater |
| City of Fayette | Jefferson | 2,000 | Community | Groundwater |
| Union Church Waterworks Assn | Jefferson | 1,456 | Community | Groundwater |
| Mcnair-Stampley W/A #2 | Jefferson | 1,188 | Community | Groundwater |
| Mcnair-Stampley W/A #1 | Jefferson | 1,148 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Mcnair-Stampley W/A #3, PWSID MS0320015, Mississippi”, https://aquacensus.com/water-systems/mississippi/mcnair-stampley-w-a-3-ms0320015 (data as of October 1, 2026).