PlainWater

Jefferson County, Texas

SDWIS compliance plate

Sheet TX245 · Jefferson County 23 sys · 2,290 viol · #275/3254

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

  • VIOL-SEVERE 95.7% flagged
  • HEALTH-HIGH 48.7% health
  • RANK-TOP #275/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-MID 25.0% detect
  • SRC-SW SW lead 78%
  • SYS-SMALL 23 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Jefferson County ranks #275 of 3,254 counties by people served, and #24 of 254 counties in Texas. See methodology · corpus placement.

Jefferson County standing, mid-flagged corpus third

Flagged-system rate 95.7% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 48.7% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #275 of 3,254 · #24 of 254 in Texas.

Flagged-rate neighbourhood around Jefferson County

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

0% 20% 40% 60% 80% 100% Howard · lowest Jefferson · this county Smith · near Bee · highest 66.7% 95.5% 95.7% 95.7% 95.7% 95.8% 100%

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

Water Systems

Compare beyond Texas

Mid-flagged peers for Jefferson County

Cross-state counties nearest Jefferson County on flagged-system share (95.7%) and cumulative violation count (2,290). 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. 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.