Public water system · TX2180002
ActiveCaverns of Sonora
At a glance
Caverns of Sonora (PWSID TX2180002) is an active transient non-community water system in Sutton County, Texas. It reports serving 64 people through 38 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
64
Service connections
38
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Caverns of Sonora compare with other water systems in Sutton County?
By EPA's size categories, Caverns of Sonora is a very small system (500 people or fewer). Sutton County has 4 active public water systems, and Caverns of Sonora is the 3rd-largest of them by population served. Its population served is well below the county average of 818 people per system, and accounts for 2% of the 3,272 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Caverns of Sonora is about 56% 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. Texas has 1,622 active transient non-community water systems, 23% 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 Caverns of Sonora?
EPA lists Caverns of Sonora 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. 2 of the 4 active systems in Sutton County (50%) are also privately owned.
Does Caverns of Sonora have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 2014. The violations listed here began between February 1992 and November 2014. By type: 3 public notice, recordkeeping or other, 2 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 as resolved and 3 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 |
|---|---|---|---|---|
| 2014-11-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2014-06-04 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2005-08-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2005-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-02-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-02-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Caverns of Sonora: frequently asked questions
Who runs Caverns of Sonora?
Caverns of Sonora (PWSID TX2180002) is a transient non-community water system privately owned. It is regulated by the TX state drinking water program.
How many people does Caverns of Sonora serve?
Caverns of Sonora reports serving 64 people through 38 service connections in Sutton County, Texas.
Where does Caverns of Sonora 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 Caverns of Sonora have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 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 Caverns of Sonora'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 7 violations for this system; 2 are health-based, and the most recent began in November 2014. For current results, consult EPA ECHO, or the TX state drinking water program.
Where can I find Caverns of Sonora's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Caverns of Sonora 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 Sutton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Sonora | Sutton | 2,766 | Community | Groundwater |
| Txdot Sutton County Sra | Sutton | 400 | Transient non-community | Groundwater |
| Sonora Industrial Park | Sutton | 42 | Non-transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Caverns of Sonora, PWSID TX2180002, Texas”, https://aquacensus.com/water-systems/texas/caverns-of-sonora-tx2180002 (data as of October 1, 2026).