Public water system · TX0700001
ActiveCity of Ennis
At a glance
City of Ennis (PWSID TX0700001) is an active community water system in Ellis County, Texas. It reports serving 24,891 people through 11,919 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
24,891
Service connections
11,919
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Ennis compare with other water systems in Ellis County?
By EPA's size categories, City of Ennis is a large system (10,001 to 100,000 people). Ellis County has 26 active public water systems, and City of Ennis is the 4th-largest of them by population served. Its population served is about 160% above the county average of 9,591 people per system, and accounts for 10% of the 249,358 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 City of Ennis is about 3.7 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 328 Texas systems (4.6%) list surface water as their primary source.
Who owns and regulates City of Ennis?
EPA lists City of Ennis 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. 21 of the 26 active systems in Ellis County (81%) are also owned by a local government.
Does City of Ennis have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2013. By type: 1 monitoring and reporting. The contaminant or rule involved is Lead and Copper Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2013-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
The one violation in EPA's records.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.
City of Ennis: frequently asked questions
Who runs City of Ennis?
City of Ennis (PWSID TX0700001) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does City of Ennis serve?
City of Ennis reports serving 24,891 people through 11,919 service connections in Ellis County, Texas.
Where does City of Ennis get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Ennis have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2013. 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 City of Ennis' 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 one violation for this system; it is not health-based, and the most recent began in December 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find City of Ennis' water quality report?
As a community water system, City of Ennis 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 Ellis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Waxahachie | Ellis | 50,814 | Community | Surface water |
| Rockett Sud | Ellis | 46,614 | Community | Purchased surface water |
| City of Midlothian | Ellis | 27,699 | Community | Surface water |
| Mountain Peak Sud | Ellis | 23,988 | Community | Purchased surface water |
| Sardis Lone Elm WSC | Ellis | 20,736 | Community | Purchased surface water |
| City of Red Oak | Ellis | 18,577 | Community | Purchased surface water |
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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, “City of Ennis, PWSID TX0700001, Texas”, https://aquacensus.com/water-systems/texas/city-of-ennis-tx0700001 (data as of October 1, 2026).