Public water system · TX0040042
ActiveAransas County MUD 1
At a glance
Aransas County MUD 1 (PWSID TX0040042) is an active community water system in Aransas County, Texas. It reports serving 615 people through 210 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
615
Service connections
210
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Aransas County MUD 1 compare with other water systems in Aransas County?
By EPA's size categories, Aransas County MUD 1 is a small system (501 to 3,300 people). Aransas County has 13 active public water systems, and Aransas County MUD 1 is the 3rd-largest of them by population served. Its population served is about half of the county average of 1,217 people per system, and accounts for 3.9% of the 15,814 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 Aransas County MUD 1 is well below 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 Aransas County MUD 1?
EPA lists Aransas County MUD 1 as owned by a local government. 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. 4 of the 13 active systems in Aransas County (31%) are also owned by a local government.
Does Aransas County MUD 1 have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2025. The violations listed here began between October 2010 and December 2025. By type: 5 public notice, recordkeeping or other, 4 contaminant level above the legal limit and 3 monitoring and reporting. The contaminant or rule involved most often is Public Notice (4 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2025-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2016-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2016-02-08 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-03-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2011-12-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2011-12-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2011-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2011-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2010-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
The 12 most recent 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.
Aransas County MUD 1: frequently asked questions
Who runs Aransas County MUD 1?
Aransas County MUD 1 (PWSID TX0040042) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Aransas County MUD 1 serve?
Aransas County MUD 1 reports serving 615 people through 210 service connections in Aransas County, Texas.
Where does Aransas County MUD 1 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 Aransas County MUD 1 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 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 Aransas County MUD 1'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. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 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 Aransas County MUD 1's water quality report?
As a community water system, Aransas County MUD 1 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 Aransas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Rockport | Aransas | 11,186 | Community | Purchased surface water |
| Holiday Beach WSC | Aransas | 2,553 | Community | Groundwater |
| Lamar Improvement District | Aransas | 450 | Community | Purchased groundwater |
| Hidden Oaks Rv Resort | Aransas | 183 | Transient non-community | Groundwater |
| Aransas National Wildlife Refuge Visitor | Aransas | 150 | Transient non-community | Groundwater |
| Tpwd Goose Island State Park | Aransas | 150 | 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, “Aransas County MUD 1, PWSID TX0040042, Texas”, https://aquacensus.com/water-systems/texas/aransas-county-mud-1-tx0040042 (data as of October 1, 2026).