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County profile · EPA SDWIS + UCMR5

Oldham County, Texas

5 SDWIS-listed public water systems serve 1,884 people in Oldham County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

5
SDWIS water systems Smaller third of counties
931
Total violations Middle third of counties
100.0%
SDWIS systems w/ a violation Middle third of counties
-
UCMR5 PFAS (none tested) No UCMR5 tests

SDWIS compliance plate

Sheet TX359 · Oldham County 5 sys · 931 viol · #3081/3254

VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-TINY · BOOK-MOST

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-LOW 2.0% health
  • RANK-BOTTOM #3081/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 100%
  • SYS-TINY 5 systems
  • BOOK-MOST 6/7 fields

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

According to EPA SDWIS county population served used on /counties, Oldham County ranks #3,081 of 3,254 counties by people served, and #233 of 254 counties in Texas. See methodology · corpus placement.

Oldham County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 2.0% is health-based share at or below the lower third (≤ 10.3%) . No UCMR5 tests in this extract for Oldham County . Population served ranks #3,081 of 3,254 · #233 of 254 in Texas.

Flagged-rate neighbourhood around Oldham County

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

0% 20% 40% 60% 80% 100% Howard · lowest Bee · highest Hidalgo · near Guadalupe · near 66.7% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Vega Municipal Water System 885 125 -
Cal Farleys Boys Ranch 500 88 -
Wildorado WSC 220 95 -
Vega Travel Center 150 188 -
Adrian Municipal Water System 129 435 -

Compare beyond Texas

Mid-flagged peers for Oldham County

Cross-state counties nearest Oldham County on flagged-system share (100.0%) and cumulative violation count (931). 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.