Public water system · OH5439612
ActiveMaria Stein Family Practice
At a glance
Maria Stein Family Practice (PWSID OH5439612) is an active transient non-community water system in Mercer County, Ohio. It reports serving 30 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2003.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Maria Stein Family Practice compare with other water systems in Mercer County?
By EPA's size categories, Maria Stein Family Practice is a very small system (500 people or fewer). Mercer County has 77 active public water systems. Its population served is well below the county average of 397 people per system, and accounts for less than 0.1% of the 30,601 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Maria Stein Family Practice is well 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. Ohio has 2,282 active transient non-community water systems, 59% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.
Who owns and regulates Maria Stein Family Practice?
EPA lists Maria Stein Family Practice as privately owned. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 69 of the 77 active systems in Mercer County (90%) are also privately owned.
Does Maria Stein Family Practice have drinking water violations?
EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2003. The violations listed here began between October 1999 and July 2003. By type: 3 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2003-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 4 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.
Maria Stein Family Practice: frequently asked questions
Who runs Maria Stein Family Practice?
Maria Stein Family Practice (PWSID OH5439612) is a transient non-community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Maria Stein Family Practice serve?
Maria Stein Family Practice reports serving 30 people through 1 service connection in Mercer County, Ohio.
Where does Maria Stein Family Practice 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 Maria Stein Family Practice have any drinking water violations?
EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2003. 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 Maria Stein Family Practice'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 4 violations for this system; 3 are health-based, and the most recent began in July 2003. For current results, consult EPA ECHO, or the OH state drinking water program.
Where can I find Maria Stein Family Practice's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Maria Stein Family Practice 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 Mercer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Celina, City of | Mercer | 11,682 | Community | Surface water |
| Coldwater Village | Mercer | 4,774 | Community | Groundwater |
| St Henry Village | Mercer | 2,596 | Community | Groundwater |
| Ft Recovery Village | Mercer | 1,501 | Community | Groundwater |
| Rockford Village | Mercer | 1,120 | Community | Groundwater |
| Mendon Village | Mercer | 628 | 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, “Maria Stein Family Practice, PWSID OH5439612, Ohio”, https://aquacensus.com/water-systems/ohio/maria-stein-family-practice-oh5439612 (data as of October 1, 2026).