Public water system · TN0000424
ActiveMadison Suburban U.D.
At a glance
Madison Suburban U.D. (PWSID TN0000424) is an active community water system in Davidson County, Tennessee. It reports serving 81,203 people through 35,153 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
81,203
Service connections
35,153
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Madison Suburban U.D. compare with other water systems in Davidson County?
By EPA's size categories, Madison Suburban U.D. is a large system (10,001 to 100,000 people). Davidson County has 4 active public water systems, and Madison Suburban U.D. is the 2nd-largest of them by population served. Its population served is about 65% below the county average of 231,370 people per system, and accounts for 8.8% of the 925,478 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 Madison Suburban U.D. is about 12 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 151 Tennessee systems (11%) list surface water as their primary source.
Who owns and regulates Madison Suburban U.D.?
EPA lists Madison Suburban U.D. as owned by a local 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. 3 of the 4 active systems in Davidson County (75%) are also owned by a local government.
Does Madison Suburban U.D. have drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2021. The violations listed here began between May 1990 and July 2021. By type: 5 monitoring and reporting, 3 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as resolved and 4 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 |
|---|---|---|---|---|
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2006-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-08-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2000-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1990-05-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Madison Suburban U.D.: frequently asked questions
Who runs Madison Suburban U.D.?
Madison Suburban U.D. (PWSID TN0000424) is a community water system owned by a local government. It is regulated by the TN state drinking water program.
How many people does Madison Suburban U.D. serve?
Madison Suburban U.D. reports serving 81,203 people through 35,153 service connections in Davidson County, Tennessee.
Where does Madison Suburban U.D. get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Madison Suburban U.D. have any drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2021. 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 Madison Suburban U.D.'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; 1 is health-based, and the most recent began in July 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the TN state drinking water program.
Where can I find Madison Suburban U.D.'s water quality report?
As a community water system, Madison Suburban U.D. 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 Davidson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Metro Water Services | Davidson | 778,153 | Community | Surface water |
| Harpeth Valley U.D. | Davidson | 65,518 | Community | Surface water |
| Sontara Old Hickory, Inc.. | Davidson | 604 | Non-transient non-community | Surface water |
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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, “Madison Suburban U.D., PWSID TN0000424, Tennessee”, https://aquacensus.com/water-systems/tennessee/madison-suburban-u-d-tn0000424 (data as of October 1, 2026).