Public water system · TX0430025
ActiveCity of Allen
At a glance
City of Allen (PWSID TX0430025) is an active community water system in Collin County, Texas. It reports serving 113,746 people through 45,046 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
113,746
Service connections
45,046
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does City of Allen compare with other water systems in Collin County?
By EPA's size categories, City of Allen is a very large system (more than 100,000 people). Collin County has 35 active public water systems, and City of Allen is the 4th-largest of them by population served. Its population served is about 3.1 times the county average of 36,284 people per system, and accounts for 9% of the 1,269,941 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 Allen is about 17 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 1,192 Texas systems (17%) list purchased surface water as their primary source.
Who owns and regulates City of Allen?
EPA lists City of Allen 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. 33 of the 35 active systems in Collin County (94%) are also owned by a local government.
Does City of Allen have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2013. The violations listed here began between January 2003 and June 2013. By type: 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2013-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-05-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 3 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.
City of Allen: frequently asked questions
Who runs City of Allen?
City of Allen (PWSID TX0430025) 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 Allen serve?
City of Allen reports serving 113,746 people through 45,046 service connections in Collin County, Texas.
Where does City of Allen get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does City of Allen have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 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 Allen'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 3 violations for this system; none is health-based, and the most recent began in June 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 Allen's water quality report?
As a community water system, City of Allen 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 Collin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Plano | Collin | 292,059 | Community | Purchased surface water |
| City of Frisco | Collin | 231,910 | Community | Purchased surface water |
| City of Mckinney | Collin | 224,043 | Community | Purchased surface water |
| City of Celina | Collin | 52,701 | Community | Purchased surface water |
| City of Wylie | Collin | 48,393 | Community | Purchased surface water |
| Town of Prosper | Collin | 42,598 | 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 Allen, PWSID TX0430025, Texas”, https://aquacensus.com/water-systems/texas/city-of-allen-tx0430025 (data as of October 1, 2026).