We found 81 public water systems in Woodbury county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Sioux City Water Supply | Sioux City | 82,759 | 72 | 27 |
| Iowa Test 3 | Sloan | 6,000 | 0 | 0 |
| Sergeant Bluff Water Supply | Sergeant Bluff | 4,227 | 0 | 3 |
| Moville Water Supply | Moville | 1,623 | 0 | 20 |
| John Morrell & Company | Sioux City | 1,325 | 0 | 0 |
| Sloan Water Supply | Sloan | 973 | 0 | 6 |
| Lawton Water Supply | Lawton | 966 | 0 | 7 |
| Sioux City Stock Yards | County of Woodbury | 880 | 0 | 0 |
| Correctionville Water Supply | Correctionville | 839 | 0 | 3 |
| Anthon Municipal Water System | Anthon | 565 | 0 | 5 |
| Dorothy Pecaut Nature Center | Sioux City | 506 | 0 | 0 |
| Cloverleaf Cold Storage | Sioux City | 400 | 0 | 0 |
| Dot-3 (i-29 Ra 015w Sergeant Bluff) | County of Woodbury | 378 | 0 | 0 |
| Pierson Water Supply | Pierson | 376 | 0 | 14 |
| Salix Water Supply | Salix | 368 | 0 | 3 |
| Dot-3 (i-29 Ra 016e Sergeant Bluff) | County of Woodbury | 359 | 0 | 0 |
| Kind And Knox | Sioux City | 350 | 0 | 0 |
| Danbury Water Supply | Danbury | 349 | 0 | 24 |
| Bronson Water Supply | Bronson | 322 | 0 | 52 |
| Sioux City Country Club | County of Woodbury | 300 | 0 | 0 |
| Sioux Tools Inc. | County of Woodbury | 250 | 0 | 0 |
| Flavorland Inc. | County of Woodbury | 240 | 0 | 0 |
| Smithland Water Supply | Smithland | 229 | 0 | 2 |
| Hornick Water Supply | Hornick | 225 | 0 | 17 |
| Cushing Water Supply | Cushing | 220 | 0 | 15 |
| Woodbury Central School | County of Woodbury | 210 | 0 | 0 |
| Skien Lutheran Church | County of Woodbury | 200 | 0 | 0 |
| Twenty-seven Flags Golf Course | Sergeant Bluff | 200 | 0 | 0 |
| Green Valley Golf Course | Sioux City | 180 | 0 | 7 |
| Global Foods Processing Inc | Sioux City | 170 | 0 | 0 |
| Stone State Park | Sioux City | 150 | 0 | 6 |
| Midamerican Energy Co. Neal North | Sioux City | 134 | 0 | 4 |
| Raskin Pack | Sioux City | 123 | 0 | 0 |
| Oto Water Supply | Oto | 108 | 0 | 0 |
| Little Sioux Pk-shelter House | County of Woodbury | 100 | 0 | 0 |
| Winnavegas Inn | Sloan | 100 | 0 | 0 |
| Midamerican Energy Co - Neal South | Sioux City | 100 | 0 | 0 |
| Ag Processing - Soy Plant | Sergeant Bluff | 90 | 0 | 0 |
| Terra International, Incorporated | County of Woodbury | 86 | 0 | 0 |
| Blue Room Club Restaurant | County of Woodbury | 75 | 0 | 0 |
| Meadows, Inc. | County of Woodbury | 74 | 0 | 0 |
| East Side Acres | Moville | 64 | 0 | 0 |
| Cloverleaf Cold Storage | County of Woodbury | 50 | 0 | 0 |
| Palmer Candy Co. | County of Woodbury | 50 | 0 | 0 |
| Holly's Corner Store | County of Woodbury | 50 | 0 | 0 |
| Shady Lane Trailer Park | County of Woodbury | 50 | 0 | 0 |
| Miracle Corner Mhp | County of Woodbury | 50 | 0 | 0 |
| Ag Processing - Refinery | Sergeant Bluff | 50 | 0 | 0 |
| Chesterman Bottle Co. | County of Woodbury | 50 | 0 | 0 |
| Salem Lutheran Church Correctionville | Correctionville | 46 | 0 | 0 |
| Mid State Imp. | County of Woodbury | 35 | 0 | 0 |
| Fmc Corporation | County of Woodbury | 35 | 0 | 0 |
| U.s. Tanning Company, Inc. | County of Woodbury | 35 | 0 | 0 |
| Whiskey Creek (schaeff) | Sioux City | 35 | 0 | 0 |
| Whiskey Creek (feedlot) | Sioux City | 34 | 0 | 0 |
| Stockmens | Sioux City | 33 | 0 | 0 |
| Koch Nitrogen Co | Sergeant Bluff | 31 | 0 | 0 |
| Albaton Wesleyan Church | County of Woodbury | 30 | 0 | 0 |
| Snyder Bend Pk-woodbury Consrv | County of Woodbury | 30 | 0 | 0 |
| Hillside Water Works | Lawton | 30 | 0 | 0 |
| Prairie Hills | Sioux City | 27 | 0 | 0 |
| The Barn (climbing Hill) | Climbing Hill | 27 | 0 | 0 |
| Buffalo Acres Mobile Home Park | Moville | 26 | 0 | 0 |
| Browns Lk-bigelow Pk-con Stand | County of Woodbury | 25 | 0 | 0 |
| Cloverleaf Cold Storage | County of Woodbury | 25 | 0 | 0 |
| Dot-3 (holstein Rest Area) | County of Woodbury | 25 | 0 | 0 |
| Cloverleaf Cold Storage | County of Woodbury | 25 | 0 | 0 |
| Lazy W Restaurant And Bar | County of Woodbury | 25 | 0 | 0 |
| Shop N Go | Sloan | 25 | 0 | 0 |
| Winn-a-vegas Casino Well | Sloan | 25 | 0 | 0 |
| Browns Lk-bigelow Pk-cmps Bldg | County of Woodbury | 25 | 0 | 0 |
| Little Sioux Pk-campers Bldg | County of Woodbury | 25 | 0 | 0 |
| Midway Store | County of Woodbury | 25 | 0 | 0 |
| Little Sioux Pk-swimming Beach | County of Woodbury | 25 | 0 | 0 |
| Fowler Forest Prsv-woodbury Co | County of Woodbury | 25 | 0 | 0 |
| Lil's Little General Store | County of Woodbury | 25 | 0 | 0 |
| David's Airport Standard | County of Woodbury | 25 | 0 | 0 |
| Sioux City Cold Storage | County of Woodbury | 25 | 0 | 0 |
| Sherman Produce | County of Woodbury | 25 | 0 | 0 |
| Cloverleaf Cold Storage | County of Woodbury | 25 | 0 | 0 |
| First Trust And Savings, Climbing Hill | County of Woodbury | 25 | 0 | 0 |