Public water system · TX0100037
ActiveLake Medina Shores
At a glance
Lake Medina Shores (PWSID TX0100037) is an active community water system in Bandera County, Texas. It reports serving 3,660 people through 1,220 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,660
Service connections
1,220
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lake Medina Shores compare with other water systems in Bandera County?
By EPA's size categories, Lake Medina Shores is a medium system (3,301 to 10,000 people). Bandera County has 65 active public water systems, and Lake Medina Shores is the largest of them by population served. Its population served is about 10 times the county average of 365 people per system, and accounts for 15% of the 23,721 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Lake Medina Shores is about half of 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. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 5,215 Texas systems (74%) list groundwater as their primary source.
Who owns and regulates Lake Medina Shores?
EPA lists Lake Medina Shores as privately owned. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 53 of the 65 active systems in Bandera County (82%) are also privately owned.
Does Lake Medina Shores have drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 2025. The violations listed here began between October 2004 and July 2025. By type: 4 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2018-09-29 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2004-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
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.
Lake Medina Shores: frequently asked questions
Who runs Lake Medina Shores?
Lake Medina Shores (PWSID TX0100037) is a community water system privately owned. It is regulated by the TX state drinking water program.
How many people does Lake Medina Shores serve?
Lake Medina Shores reports serving 3,660 people through 1,220 service connections in Bandera County, Texas.
Where does Lake Medina Shores 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 Lake Medina Shores have any drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 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 Lake Medina Shores' 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; 4 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Lake Medina Shores' water quality report?
As a community water system, Lake Medina Shores 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 Bandera County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Bandera | Bandera | 3,231 | Community | Groundwater |
| Bandera County Fwsd 1 | Bandera | 1,092 | Community | Groundwater |
| Bandera River Ranch 1 | Bandera | 1,053 | Community | Groundwater |
| Bridlegate Subdivision | Bandera | 882 | Community | Groundwater |
| Flying L PUD | Bandera | 837 | Community | Groundwater |
| Lakewood Water | Bandera | 816 | 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, “Lake Medina Shores, PWSID TX0100037, Texas”, https://aquacensus.com/water-systems/texas/lake-medina-shores-tx0100037 (data as of October 1, 2026).