Public water system · MD1151025
ActivePotomac Swim and Tennis
At a glance
Potomac Swim and Tennis (PWSID MD1151025) is an active transient non-community water system in Montgomery County, Maryland. It reports serving 100 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Potomac Swim and Tennis compare with other water systems in Montgomery County?
By EPA's size categories, Potomac Swim and Tennis is a very small system (500 people or fewer). Montgomery County has 49 active public water systems. Its population served is well below the county average of 39,103 people per system, and accounts for less than 0.1% of the 1,916,066 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Potomac Swim and Tennis is about 31% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Maryland has 2,079 active transient non-community water systems, 69% of the state's 2,992 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,870 Maryland systems (96%) list groundwater as their primary source.
Who owns and regulates Potomac Swim and Tennis?
EPA lists Potomac Swim and Tennis as privately owned. The MD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 40 of the 49 active systems in Montgomery County (82%) are also privately owned.
Does Potomac Swim and Tennis have drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2014. The violations listed here began between July 2003 and July 2014. By type: 9 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 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 |
|---|---|---|---|---|
| 2014-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | 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.
Potomac Swim and Tennis: frequently asked questions
Who runs Potomac Swim and Tennis?
Potomac Swim and Tennis (PWSID MD1151025) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Potomac Swim and Tennis serve?
Potomac Swim and Tennis reports serving 100 people through 1 service connection in Montgomery County, Maryland.
Where does Potomac Swim and Tennis 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 Potomac Swim and Tennis have any drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in July 2014. 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 Potomac Swim and Tennis' 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; none is health-based, and the most recent began in July 2014. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Potomac Swim and Tennis' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Potomac Swim and Tennis is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Montgomery County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Washington Suburban Sanitary Commission | Montgomery | 1,900,000 | Community | Surface water |
| Town of Poolesville | Montgomery | 6,005 | Community | Groundwater under influence of surface water |
| Adventist Healthcare Shady Grove Med Ctr | Montgomery | 2,100 | Non-transient non-community | Purchased surface water |
| National Institutes of Health | Montgomery | 1,100 | Non-transient non-community | Purchased surface water |
| Glenstone Foundation | Montgomery | 537 | Non-transient non-community | Groundwater |
| Dickerson Market | Montgomery | 510 | 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, “Potomac Swim and Tennis, PWSID MD1151025, Maryland”, https://aquacensus.com/water-systems/maryland/potomac-swim-and-tennis-md1151025 (data as of October 1, 2026).