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Counties → Texas

Dallas County, Texas

SDWIS compliance plate

Sheet TX113 · Dallas County 37 sys · 2,618 viol · #11/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 94.6% flagged
  • HEALTH-LOW 15.5% health
  • RANK-TOP #11/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-HIGH 100.0% detect
  • SRC-SW SW lead 84%
  • SYS-SMALL 37 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: San Jacinto County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Dallas County ranks #11 of 3,254 counties by people served, and #2 of 254 counties in Texas. See methodology · corpus placement.

Dallas County standing, mid-flagged corpus third

Flagged-system rate 94.6% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 15.5% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #11 of 3,254 · #2 of 254 in Texas.

Flagged-rate neighbourhood around Dallas County

Lowest/highest poles plus in-state counties nearest Dallas County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Howard · lowest Wilson · near San Jacinto · near Bee · highest 66.7% 94.1% 94.4% 94.6% 94.7% 95% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Dallas Water Utility 1,356,479 4 Detected
City of Irving 264,546 8 Detected
City of Garland 248,822 13 Detected
City of Grand Prairie 201,843 15 Detected
Dallas Fort Worth International Airport 177,673 12 Detected
City of Mesquite 152,020 9 Detected
City of Carrollton 136,170 2 Detected
City of Richardson 122,615 2 Detected
City of Rowlett 66,212 16 Detected
City of Desoto 57,999 87 Detected
City of Cedar Hill 50,904 34 Detected
City of Coppell 43,193 6 Detected
City of Lancaster 40,449 26 Detected
City of Farmers Branch 40,246 22 Detected
City of Duncanville 39,413 29 Detected
City of Sachse 29,042 13 Detected
City of Balch Springs 28,300 44 Detected
City of University Park 25,278 0 Detected
City of Seagoville 20,156 93 Detected
City of Glenn Heights 18,718 41 Detected
Town of Addison 17,257 18 Detected
Town of Highland Park 8,959 7 Detected
Town of Sunnyvale 8,839 68 Detected
City of Wilmer 6,690 186 Detected
City of Hutchins 5,902 29 Detected
City of Cockrell Hill 3,820 102 Detected
Combine WSC 3,588 55 Detected
Lancaster MUD 1 2,685 47 -
Danieldale Community Water Service 702 199 -
Forterra Pressure Pipe Grand Prairie 662 658 -
Matthew Road WSC 279 185 -
D Bar B Mobile Home Ranch 267 342 -
Cottonwood Creek Mobile Home Park 225 198 -
Dallas County MUD 4 150 0 -
Parkerville East Mobile Home Park 42 33 -
Btb Dallas Mountain Creek Hauling Operat 25 8 -
Dallas County Park Cities MUD 0 7 -

Compare beyond Texas

Mid-flagged peers for Dallas County

Cross-state counties nearest Dallas County on flagged-system share (94.6%) and cumulative violation count (2,618). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.