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County profile · EPA SDWIS + UCMR5

Walker County, Texas

33 SDWIS-listed public water systems serve 71,374 people in Walker County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

33
SDWIS water systems Middle third of counties
4,949
Total violations Upper third of counties
97.0%
SDWIS systems w/ a violation Middle third of counties
100.0%
UCMR5 PFAS rate (2 tested) Upper third of counties with tests

SDWIS compliance plate

Sheet TX471 · Walker County 33 sys · 4,949 viol · #727/3254

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

  • VIOL-SEVERE 97.0% flagged
  • HEALTH-LOW 12.9% health
  • RANK-UPPER #727/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 100.0% detect
  • SRC-GW GW lead 91%
  • SYS-SMALL 33 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Erath County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Walker County ranks #727 of 3,254 counties by people served, and #53 of 254 counties in Texas. See methodology · corpus placement.

Walker County standing, mid-flagged corpus third

Flagged-system rate 97.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 12.9% 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 #727 of 3,254 · #53 of 254 in Texas.

Flagged-rate neighbourhood around Walker County

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

0% 20% 40% 60% 80% 100% Howard · lowest Bell · near Walker · this county Bee · highest 66.7% 96.7% 96.7% 96.8% 97% 97.3% 100%

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

Water Systems

Compare beyond Texas

Mid-flagged peers for Walker County

Cross-state counties nearest Walker County on flagged-system share (97.0%) and cumulative violation count (4,949). 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.