Public water system · TX0570007

Active

City of Duncanville

At a glance

City of Duncanville (PWSID TX0570007) is an active community water system in Dallas County, Texas. It reports serving 39,413 people through 14,684 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in December 2017.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

39,413

Service connections

14,684

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDTX0570007

System typeCommunity water system

Activity statusActive

Population served39,413

Service connections14,684

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyTX state drinking water program

City served—

StateTexas

ZIP—

CountyDallas County

How does City of Duncanville compare with other water systems in Dallas County?

By EPA's size categories, City of Duncanville is a large system (10,001 to 100,000 people). Dallas County has 35 active public water systems. Its population served is about 57% below the county average of 90,969 people per system, and accounts for 1.2% of the 3,183,922 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 Duncanville is about 5.9 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 Duncanville?

EPA lists City of Duncanville 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. 31 of the 35 active systems in Dallas County (89%) are also owned by a local government.

Does City of Duncanville have drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in December 2017. The violations listed here began between April 2006 and December 2017. By type: 5 public notice, recordkeeping or other, 5 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Public Notice (5 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
2017-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2013-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2008-07-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2008-05-26	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2008-05-26	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2007-12-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2007-11-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2007-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2006-07-02	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2006-06-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2006-05-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2006-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	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.

City of Duncanville: frequently asked questions

Who runs City of Duncanville?

City of Duncanville (PWSID TX0570007) 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 Duncanville serve?

City of Duncanville reports serving 39,413 people through 14,684 service connections in Dallas County, Texas.

Where does City of Duncanville 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 Duncanville have any drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in December 2017. 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 Duncanville'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, 5 are health-based, and the most recent began in December 2017. 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 Duncanville's water quality report?

As a community water system, City of Duncanville 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 Dallas County

Water system	County	Population served	Type	Source
Dallas Water Utility	Dallas	1,356,479	Community	Surface water
City of Irving	Dallas	264,546	Community	Purchased surface water
City of Garland	Dallas	248,822	Community	Purchased surface water
City of Grand Prairie	Dallas	201,843	Community	Purchased surface water
Dallas Fort Worth International Airport	Dallas	177,673	Non-transient non-community	Purchased surface water
City of Mesquite	Dallas	152,020	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 Duncanville, PWSID TX0570007, Texas”, https://aquacensus.com/water-systems/texas/city-of-duncanville-tx0570007 (data as of October 1, 2026).