Public water system · TX0610004
ActiveCity of Lewisville
At a glance
City of Lewisville (PWSID TX0610004) is an active community water system in Denton County, Texas. It reports serving 140,880 people through 59,632 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 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
140,880
Service connections
59,632
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Lewisville compare with other water systems in Denton County?
By EPA's size categories, City of Lewisville is a very large system (more than 100,000 people). Denton County has 88 active public water systems, and City of Lewisville is the 2nd-largest of them by population served. Its population served is about 15 times the county average of 9,202 people per system, and accounts for 17% of the 809,752 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 Lewisville is about 21 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 Lewisville?
EPA lists City of Lewisville 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. 43 of the 88 active systems in Denton County (49%) are also owned by a local government.
Does City of Lewisville 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 2025. 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 |
|---|---|---|---|---|
| 2025-12-30 | 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 Lewisville: frequently asked questions
Who runs City of Lewisville?
City of Lewisville (PWSID TX0610004) 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 Lewisville serve?
City of Lewisville reports serving 140,880 people through 59,632 service connections in Denton County, Texas.
Where does City of Lewisville 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 Lewisville 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 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 City of Lewisville'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 one violation for this system; it is not 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 City of Lewisville's water quality report?
As a community water system, City of Lewisville 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 Denton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Denton | Denton | 150,037 | Community | Surface water |
| Mustang Sud | Denton | 110,826 | Community | Purchased surface water |
| Town of Flower Mound | Denton | 80,000 | Community | Purchased surface water |
| City of the Colony | Denton | 45,367 | Community | Purchased surface water |
| Town of Little Elm | Denton | 41,000 | Community | Purchased surface water |
| City of Corinth | Denton | 23,213 | 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 Lewisville, PWSID TX0610004, Texas”, https://aquacensus.com/water-systems/texas/city-of-lewisville-tx0610004 (data as of October 1, 2026).