Public water system · TN0000468
ActiveNsa - Midsouth
At a glance
Nsa - Midsouth (PWSID TN0000468) is an active community water system in Shelby County, Tennessee. It reports serving 7,000 people through 518 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,000
Service connections
518
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Nsa - Midsouth compare with other water systems in Shelby County?
By EPA's size categories, Nsa - Midsouth is a medium system (3,301 to 10,000 people). Shelby County has 10 active public water systems, and Nsa - Midsouth is the 6th-largest of them by population served. Its population served is well below the county average of 82,345 people per system, and accounts for 0.9% of the 823,454 people reported by systems filed under the county. Across Tennessee, the 1,383 active systems average 5,780 people each. Nationally, the average active community water system reports serving 6,703 people, so Nsa - Midsouth 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. Tennessee has 450 active community water systems, 33% of the state's 1,383 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,038 Tennessee systems (75%) list groundwater as their primary source.
Who owns and regulates Nsa - Midsouth?
EPA lists Nsa - Midsouth as owned by the federal government. The TN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 10 active systems in Shelby County (10%) are also owned by the federal government.
Does Nsa - Midsouth have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2004. The violations listed here began between January 1993 and July 2004. By type: 7 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 5 as archived and 2 as resolved. 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. 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 |
|---|---|---|---|---|
| 2004-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 1998-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarbcode 2047 | No | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfoxidecode 2043 | No | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfonecode 2044 | No | Archived |
All 7 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.
Nsa - Midsouth: frequently asked questions
Who runs Nsa - Midsouth?
Nsa - Midsouth (PWSID TN0000468) is a community water system owned by the federal government. It is regulated by the TN state drinking water program.
How many people does Nsa - Midsouth serve?
Nsa - Midsouth reports serving 7,000 people through 518 service connections in Shelby County, Tennessee.
Where does Nsa - Midsouth 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 Nsa - Midsouth have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2004. 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 Nsa - Midsouth'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 7 violations for this system; none is health-based, and the most recent began in July 2004. For current results, consult the system's annual water quality report, EPA ECHO, or the TN state drinking water program.
Where can I find Nsa - Midsouth's water quality report?
As a community water system, Nsa - Midsouth 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 Shelby County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Memphis Light, Gas, & Water | Shelby | 659,500 | Community | Groundwater |
| Bartlett Water System | Shelby | 57,129 | Community | Groundwater |
| Collierville Water Dept | Shelby | 51,972 | Community | Groundwater |
| Germantown Water Dept | Shelby | 37,738 | Community | Groundwater |
| Millington Water Dept | Shelby | 8,935 | Community | Groundwater |
| Blues City Brewery, LLC | Shelby | 800 | 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, “Nsa - Midsouth, PWSID TN0000468, Tennessee”, https://aquacensus.com/water-systems/tennessee/nsa-midsouth-tn0000468 (data as of October 1, 2026).