Tapcensus

Texas

Dallas County drinking water quality

37 active public water systems serve 3,191,634 people in Dallas County. 10 are compliant, 27 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 1 carries a health flag.

Active systems 37 34 community systems
People served 3.2M by public water systems
Systems with violations 27 73% of active systems, past 3 years
Serious violators 1 1 systems carry a health flag

Needs attention

Matthew Road WSC TX0570098 · Community water system · Serves 279 5 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions, Public Notice Rule and Revised PN Rule, and Consumer Confidence Rule.

Community water systems

34 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Dallas Water Utility
 1,356,479 0 0
City of Irving
 264,546 0 0
City of Garland
 248,822 2 0
City of Grand Prairie
 201,843 0 0
City of Mesquite
 158,412 1 0
City of Carrollton
 136,170 0 0
City of Richardson
 122,615 0 0
City of Rowlett
 68,123 2 0
City of Desoto
 57,999 1 0
City of Cedar Hill
 50,904 2 1
City of Coppell
 43,193 1 0
City of Lancaster
 40,449 2 1
City of Farmers Branch
 40,246 0 0
City of Duncanville
 39,413 0 0
City of Sachse
 30,630 0 0
City of Balch Springs
 28,300 2 0
City of University Park
 25,617 1 0
City of Seagoville
 20,156 3 0
City of Glenn Heights
 18,718 1 1
Town of Addison
 17,257 0 0
Town of Highland Park
 8,959 1 0
Town of Sunnyvale
 8,839 1 0
City of Wilmer
 7,296 1 1
City of Hutchins
 6,495 5 1
City of Cockrell Hill
 3,855 1 0
Combine WSC
 3,588 3 0
Lancaster MUD 1
 2,685 1 1
Danieldale Community Water Service
 702 2 1
Matthew Road WSC
 279 5 3
D Bar B Mobile Home Ranch
 267 1 1
Cottonwood Creek Mobile Home Park
 225 6 1
Dallas County MUD 4
 150 0 0
Parkerville East Mobile Home Park
 42 4 1
Dallas County Park Cities MUD
 0 2 0
Non-community systems (3: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Dallas Fort Worth International Airport
 177,673 1 0
Forterra Pressure Pipe Grand Prairie
 662 1 0
Btb Dallas Mountain Creek Hauling Operat
 25 1 0
Inactive systems (76, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.