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Counties → Iowa

Woodbury County, Iowa

SDWIS compliance plate

Sheet IA193 · Woodbury County 32 sys · 1,715 viol · #578/3254

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

  • VIOL-SEVERE 78.1% flagged
  • HEALTH-MID 21.6% health
  • RANK-TOP #578/3254
  • PHOTO-FINISH ±0.4 pp
  • PFAS-HIGH 50.0% detect
  • SRC-GW GW lead 97%
  • SYS-SMALL 32 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Worth County (+ 0.4 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Woodbury County ranks #578 of 3,254 counties by people served, and #7 of 99 counties in Iowa. See methodology · corpus placement.

Woodbury County standing, lower-flagged corpus third

Flagged-system rate 78.1% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 21.6% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #578 of 3,254 · #7 of 99 in Iowa.

Flagged-rate neighbourhood around Woodbury County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Woodbury · this county Wapello · near 75% 76.3% 78.1% 78.6% 80% 100%

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

Water Systems

System Name Population Violations PFAS
Sioux City Water Supply 85,791 133 Detected
Sergeant Bluff Water Supply 5,015 22 Clean
Moville Water Supply 1,687 76 -
Sloan Water Supply 1,042 61 -
Lawton Water Supply 943 37 -
Correctionville Water Supply 766 28 -
Anthon Municipal Water System 545 47 -
Pierson Water Supply 337 62 -
Danbury Water Supply 320 117 -
Lofted View Events 314 15 -
Salix Water Supply 295 21 -
Bronson Water Supply 294 248 -
Hornick Water Supply 255 74 -
Cushing Water Supply 230 87 -
Dorothy Pecaut Nature Center 208 0 -
Smithland Water Supply 181 42 -
Green Valley Golf Course 180 51 -
Stone State Park 150 61 -
Little Sioux Park 141 0 -
Ag Processing - Soy Plant 110 52 -
Midamerican Energy Co - Neal South 107 0 -
Midamerican Energy Co. Neal North 100 26 -
Oto Water Supply 72 82 -
Browns Lake Bigelow Park 72 0 -
East Side Acres 70 245 -
Ag Processing - Refinery 50 7 -
Salem Lutheran Church Correctionville 35 113 -
Whiskey Creek (Feedlot) 34 4 -
Berea Heights Inc 33 0 -
Koch Fertilizer LLC 30 4 -
Snyder Bend Pk-Woodbury Consrv 29 0 -
Oscar Carl Vineyard 25 0 -

Compare beyond Iowa

Lower-flagged peers for Woodbury County

Cross-state counties nearest Woodbury County on flagged-system share (78.1%) and cumulative violation count (1,715). 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.