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County profile · EPA SDWIS + UCMR5

Aransas County, Texas

18 SDWIS-listed public water systems serve 19,735 people in Aransas County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

18
SDWIS water systems Middle third of counties
573
Total violations Lower third of counties
94.4%
SDWIS systems w/ a violation Middle third of counties
100.0%
UCMR5 PFAS rate (1 tested) Upper third of counties with tests

SDWIS compliance plate

Sheet TX007 · Aransas County 18 sys · 573 viol · #1785/3254

VIOL-SEVERE · HEALTH-MID · RANK-MID · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 94.4% flagged
  • HEALTH-MID 23.6% health
  • RANK-MID #1785/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-HIGH 100.0% detect
  • SRC-GW GW lead 78%
  • SYS-SMALL 18 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Wilson County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Aransas County ranks #1,785 of 3,254 counties by people served, and #126 of 254 counties in Texas. See methodology · corpus placement.

Aransas County standing, mid-flagged corpus third

Flagged-system rate 94.4% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 23.6% 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 #1,785 of 3,254 · #126 of 254 in Texas.

Flagged-rate neighbourhood around Aransas County

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

0% 20% 40% 60% 80% 100% Howard · lowest Aransas · this county Dallas · near Bee · highest 66.7% 94.1% 94.4% 94.4% 94.6% 94.7% 100%

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

Water Systems

Compare beyond Texas

Mid-flagged peers for Aransas County

Cross-state counties nearest Aransas County on flagged-system share (94.4%) and cumulative violation count (573). 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
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. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.