Foundation and soil movement risk, county by county
Where houses sit on slabs rather than over basements: 1148 counties across 16 states, each with the USDA soil survey values that decide how the ground behaves under a house. Basements are rare in these states, so these pages lead with movement under the slab and the footings. The basement belt is here.
Highest combined risk in our coverage
| County | Index | Dominant drainage class |
|---|---|---|
| East Feliciana Parish, LA | 79 | poorly drained |
| St. James Parish, LA | 79 | poorly drained |
| Brazoria County, TX | 79 | poorly drained |
| Wharton County, TX | 79 | poorly drained |
| St. Helena Parish, LA | 78 | poorly drained |
| Jasper County, TX | 78 | poorly drained |
| San Jacinto County, TX | 78 | poorly drained |
| West Feliciana Parish, LA | 77 | poorly drained |
| Chambers County, TX | 77 | poorly drained |
| Clay County, AR | 76 | poorly drained |
| Livingston Parish, LA | 76 | poorly drained |
| Jefferson County, MS | 76 | poorly drained |
| Hardin County, TX | 76 | poorly drained |
| Newton County, TX | 76 | poorly drained |
| St. Martin Parish, LA | 75 | poorly drained |
| Coahoma County, MS | 75 | poorly drained |
| Issaquena County, MS | 75 | poorly drained |
| Jefferson County, TX | 75 | poorly drained |
| Orange County, TX | 75 | poorly drained |
| Walker County, TX | 75 | poorly drained |
Alabama 67 counties
- Autauga
- Baldwin
- Barbour
- Bibb
- Blount
- Bullock
- Butler
- Calhoun
- Chambers
- Cherokee
- Chilton
- Choctaw
- Clarke
- Clay
- Cleburne
- Coffee
- Colbert
- Conecuh
- Coosa
- Covington
- Crenshaw
- Cullman
- Dale
- Dallas
- DeKalb
- Elmore
- Escambia
- Etowah
- Fayette
- Franklin
- Geneva
- Greene
- Hale
- Henry
- Houston
- Jackson
- Jefferson
- Lamar
- Lauderdale
- Lawrence
- Lee
- Limestone
- Lowndes
- Macon
- Madison
- Marengo
- Marion
- Marshall
- Mobile
- Monroe
- Montgomery
- Morgan
- Perry
- Pickens
- Pike
- Randolph
- Russell
- Shelby
- St. Clair
- Sumter
- Talladega
- Tallapoosa
- Tuscaloosa
- Walker
- Washington
- Wilcox
- Winston
Alaska 29 counties
- Aleutians East Borough
- Aleutians West Census Area
- Anchorage Municipality
- Bethel Census Area
- Bristol Bay Borough
- Copper River Census Area
- Denali Borough
- Dillingham Census Area
- Fairbanks North Star Borough
- Haines Borough
- Hoonah-Angoon Census Area
- Juneau City and Borough
- Kenai Peninsula Borough
- Ketchikan Gateway Borough
- Kodiak Island Borough
- Kusilvak Census Area
- Lake and Peninsula Borough
- Matanuska-Susitna Borough
- Nome Census Area
- North Slope Borough
- Northwest Arctic Borough
- Petersburg Borough
- Prince of Wales-Hyder Census Area
- Sitka City and Borough
- Skagway Municipality
- Southeast Fairbanks Census Area
- Wrangell City and Borough
- Yakutat City and Borough
- Yukon-Koyukuk Census Area
Arizona 15 counties
Arkansas 75 counties
- Arkansas
- Ashley
- Baxter
- Benton
- Boone
- Bradley
- Calhoun
- Carroll
- Chicot
- Clark
- Clay
- Cleburne
- Cleveland
- Columbia
- Conway
- Craighead
- Crawford
- Crittenden
- Cross
- Dallas
- Desha
- Drew
- Faulkner
- Franklin
- Fulton
- Garland
- Grant
- Greene
- Hempstead
- Hot Spring
- Howard
- Independence
- Izard
- Jackson
- Jefferson
- Johnson
- Lafayette
- Lawrence
- Lee
- Lincoln
- Little River
- Logan
- Lonoke
- Madison
- Marion
- Miller
- Mississippi
- Monroe
- Montgomery
- Nevada
- Newton
- Ouachita
- Perry
- Phillips
- Pike
- Poinsett
- Polk
- Pope
- Prairie
- Pulaski
- Randolph
- Saline
- Scott
- Searcy
- Sebastian
- Sevier
- Sharp
- St. Francis
- Stone
- Union
- Van Buren
- Washington
- White
- Woodruff
- Yell
California 58 counties
- Alameda
- Alpine
- Amador
- Butte
- Calaveras
- Colusa
- Contra Costa
- Del Norte
- El Dorado
- Fresno
- Glenn
- Humboldt
- Imperial
- Inyo
- Kern
- Kings
- Lake
- Lassen
- Los Angeles
- Madera
- Marin
- Mariposa
- Mendocino
- Merced
- Modoc
- Mono
- Monterey
- Napa
- Nevada
- Orange
- Placer
- Plumas
- Riverside
- Sacramento
- San Benito
- San Bernardino
- San Diego
- San Francisco
- San Joaquin
- San Luis Obispo
- San Mateo
- Santa Barbara
- Santa Clara
- Santa Cruz
- Shasta
- Sierra
- Siskiyou
- Solano
- Sonoma
- Stanislaus
- Sutter
- Tehama
- Trinity
- Tulare
- Tuolumne
- Ventura
- Yolo
- Yuba
Florida 67 counties
- Alachua
- Baker
- Bay
- Bradford
- Brevard
- Broward
- Calhoun
- Charlotte
- Citrus
- Clay
- Collier
- Columbia
- DeSoto
- Dixie
- Duval
- Escambia
- Flagler
- Franklin
- Gadsden
- Gilchrist
- Glades
- Gulf
- Hamilton
- Hardee
- Hendry
- Hernando
- Highlands
- Hillsborough
- Holmes
- Indian River
- Jackson
- Jefferson
- Lafayette
- Lake
- Lee
- Leon
- Levy
- Liberty
- Madison
- Manatee
- Marion
- Martin
- Miami-Dade
- Monroe
- Nassau
- Okaloosa
- Okeechobee
- Orange
- Osceola
- Palm Beach
- Pasco
- Pinellas
- Polk
- Putnam
- Santa Rosa
- Sarasota
- Seminole
- St. Johns
- St. Lucie
- Sumter
- Suwannee
- Taylor
- Union
- Volusia
- Wakulla
- Walton
- Washington
Georgia 159 counties
- Appling
- Atkinson
- Bacon
- Baker
- Baldwin
- Banks
- Barrow
- Bartow
- Ben Hill
- Berrien
- Bibb
- Bleckley
- Brantley
- Brooks
- Bryan
- Bulloch
- Burke
- Butts
- Calhoun
- Camden
- Candler
- Carroll
- Catoosa
- Charlton
- Chatham
- Chattahoochee
- Chattooga
- Cherokee
- Clarke
- Clay
- Clayton
- Clinch
- Cobb
- Coffee
- Colquitt
- Columbia
- Cook
- Coweta
- Crawford
- Crisp
- Dade
- Dawson
- DeKalb
- Decatur
- Dodge
- Dooly
- Dougherty
- Douglas
- Early
- Echols
- Effingham
- Elbert
- Emanuel
- Evans
- Fannin
- Fayette
- Floyd
- Forsyth
- Franklin
- Fulton
- Gilmer
- Glascock
- Glynn
- Gordon
- Grady
- Greene
- Gwinnett
- Habersham
- Hall
- Hancock
- Haralson
- Harris
- Hart
- Heard
- Henry
- Houston
- Irwin
- Jackson
- Jasper
- Jeff Davis
- Jefferson
- Jenkins
- Johnson
- Jones
- Lamar
- Lanier
- Laurens
- Lee
- Liberty
- Lincoln
- Long
- Lowndes
- Lumpkin
- Macon
- Madison
- Marion
- McDuffie
- McIntosh
- Meriwether
- Miller
- Mitchell
- Monroe
- Montgomery
- Morgan
- Murray
- Muscogee
- Newton
- Oconee
- Oglethorpe
- Paulding
- Peach
- Pickens
- Pierce
- Pike
- Polk
- Pulaski
- Putnam
- Quitman
- Rabun
- Randolph
- Richmond
- Rockdale
- Schley
- Screven
- Seminole
- Spalding
- Stephens
- Stewart
- Sumter
- Talbot
- Taliaferro
- Tattnall
- Taylor
- Telfair
- Terrell
- Thomas
- Tift
- Toombs
- Towns
- Treutlen
- Troup
- Turner
- Twiggs
- Union
- Upson
- Walker
- Walton
- Ware
- Warren
- Washington
- Wayne
- Webster
- Wheeler
- White
- Whitfield
- Wilcox
- Wilkes
- Wilkinson
- Worth
Hawaii 5 counties
Louisiana 64 counties
- Acadia Parish
- Allen Parish
- Ascension Parish
- Assumption Parish
- Avoyelles Parish
- Beauregard Parish
- Bienville Parish
- Bossier Parish
- Caddo Parish
- Calcasieu Parish
- Caldwell Parish
- Cameron Parish
- Catahoula Parish
- Claiborne Parish
- Concordia Parish
- De Soto Parish
- East Baton Rouge Parish
- East Carroll Parish
- East Feliciana Parish
- Evangeline Parish
- Franklin Parish
- Grant Parish
- Iberia Parish
- Iberville Parish
- Jackson Parish
- Jefferson Davis Parish
- Jefferson Parish
- La Salle Parish
- Lafayette Parish
- Lafourche Parish
- Lincoln Parish
- Livingston Parish
- Madison Parish
- Morehouse Parish
- Natchitoches Parish
- Orleans Parish
- Ouachita Parish
- Plaquemines Parish
- Pointe Coupee Parish
- Rapides Parish
- Red River Parish
- Richland Parish
- Sabine Parish
- St. Bernard Parish
- St. Charles Parish
- St. Helena Parish
- St. James Parish
- St. John the Baptist Parish
- St. Landry Parish
- St. Martin Parish
- St. Mary Parish
- St. Tammany Parish
- Tangipahoa Parish
- Tensas Parish
- Terrebonne Parish
- Union Parish
- Vermilion Parish
- Vernon Parish
- Washington Parish
- Webster Parish
- West Baton Rouge Parish
- West Carroll Parish
- West Feliciana Parish
- Winn Parish
Mississippi 82 counties
- Adams
- Alcorn
- Amite
- Attala
- Benton
- Bolivar
- Calhoun
- Carroll
- Chickasaw
- Choctaw
- Claiborne
- Clarke
- Clay
- Coahoma
- Copiah
- Covington
- DeSoto
- Forrest
- Franklin
- George
- Greene
- Grenada
- Hancock
- Harrison
- Hinds
- Holmes
- Humphreys
- Issaquena
- Itawamba
- Jackson
- Jasper
- Jefferson
- Jefferson Davis
- Jones
- Kemper
- Lafayette
- Lamar
- Lauderdale
- Lawrence
- Leake
- Lee
- Leflore
- Lincoln
- Lowndes
- Madison
- Marion
- Marshall
- Monroe
- Montgomery
- Neshoba
- Newton
- Noxubee
- Oktibbeha
- Panola
- Pearl River
- Perry
- Pike
- Pontotoc
- Prentiss
- Quitman
- Rankin
- Scott
- Sharkey
- Simpson
- Smith
- Stone
- Sunflower
- Tallahatchie
- Tate
- Tippah
- Tishomingo
- Tunica
- Union
- Walthall
- Warren
- Washington
- Wayne
- Webster
- Wilkinson
- Winston
- Yalobusha
- Yazoo
Nevada 17 counties
- Carson City
- Churchill
- Clark
- Douglas
- Elko
- Esmeralda
- Eureka
- Humboldt
- Lander
- Lincoln
- Lyon
- Mineral
- Nye
- Pershing
- Storey
- Washoe
- White Pine
New Mexico 33 counties
- Bernalillo
- Catron
- Chaves
- Cibola
- Colfax
- Curry
- De Baca
- Doña Ana
- Eddy
- Grant
- Guadalupe
- Harding
- Hidalgo
- Lea
- Lincoln
- Los Alamos
- Luna
- McKinley
- Mora
- Otero
- Quay
- Rio Arriba
- Roosevelt
- San Juan
- San Miguel
- Sandoval
- Santa Fe
- Sierra
- Socorro
- Taos
- Torrance
- Union
- Valencia
North Carolina 100 counties
- Alamance
- Alexander
- Alleghany
- Anson
- Ashe
- Avery
- Beaufort
- Bertie
- Bladen
- Brunswick
- Buncombe
- Burke
- Cabarrus
- Caldwell
- Camden
- Carteret
- Caswell
- Catawba
- Chatham
- Cherokee
- Chowan
- Clay
- Cleveland
- Columbus
- Craven
- Cumberland
- Currituck
- Dare
- Davidson
- Davie
- Duplin
- Durham
- Edgecombe
- Forsyth
- Franklin
- Gaston
- Gates
- Graham
- Granville
- Greene
- Guilford
- Halifax
- Harnett
- Haywood
- Henderson
- Hertford
- Hoke
- Hyde
- Iredell
- Jackson
- Johnston
- Jones
- Lee
- Lenoir
- Lincoln
- Macon
- Madison
- Martin
- McDowell
- Mecklenburg
- Mitchell
- Montgomery
- Moore
- Nash
- New Hanover
- Northampton
- Onslow
- Orange
- Pamlico
- Pasquotank
- Pender
- Perquimans
- Person
- Pitt
- Polk
- Randolph
- Richmond
- Robeson
- Rockingham
- Rowan
- Rutherford
- Sampson
- Scotland
- Stanly
- Stokes
- Surry
- Swain
- Transylvania
- Tyrrell
- Union
- Vance
- Wake
- Warren
- Washington
- Watauga
- Wayne
- Wilkes
- Wilson
- Yadkin
- Yancey
Oklahoma 77 counties
- Adair
- Alfalfa
- Atoka
- Beaver
- Beckham
- Blaine
- Bryan
- Caddo
- Canadian
- Carter
- Cherokee
- Choctaw
- Cimarron
- Cleveland
- Coal
- Comanche
- Cotton
- Craig
- Creek
- Custer
- Delaware
- Dewey
- Ellis
- Garfield
- Garvin
- Grady
- Grant
- Greer
- Harmon
- Harper
- Haskell
- Hughes
- Jackson
- Jefferson
- Johnston
- Kay
- Kingfisher
- Kiowa
- Latimer
- Le Flore
- Lincoln
- Logan
- Love
- Major
- Marshall
- Mayes
- McClain
- McCurtain
- McIntosh
- Murray
- Muskogee
- Noble
- Nowata
- Okfuskee
- Oklahoma
- Okmulgee
- Osage
- Ottawa
- Pawnee
- Payne
- Pittsburg
- Pontotoc
- Pottawatomie
- Pushmataha
- Roger Mills
- Rogers
- Seminole
- Sequoyah
- Stephens
- Texas
- Tillman
- Tulsa
- Wagoner
- Washington
- Washita
- Woods
- Woodward
South Carolina 46 counties
- Abbeville
- Aiken
- Allendale
- Anderson
- Bamberg
- Barnwell
- Beaufort
- Berkeley
- Calhoun
- Charleston
- Cherokee
- Chester
- Chesterfield
- Clarendon
- Colleton
- Darlington
- Dillon
- Dorchester
- Edgefield
- Fairfield
- Florence
- Georgetown
- Greenville
- Greenwood
- Hampton
- Horry
- Jasper
- Kershaw
- Lancaster
- Laurens
- Lee
- Lexington
- Marion
- Marlboro
- McCormick
- Newberry
- Oconee
- Orangeburg
- Pickens
- Richland
- Saluda
- Spartanburg
- Sumter
- Union
- Williamsburg
- York
Texas 254 counties
- Anderson
- Andrews
- Angelina
- Aransas
- Archer
- Armstrong
- Atascosa
- Austin
- Bailey
- Bandera
- Bastrop
- Baylor
- Bee
- Bell
- Bexar
- Blanco
- Borden
- Bosque
- Bowie
- Brazoria
- Brazos
- Brewster
- Briscoe
- Brooks
- Brown
- Burleson
- Burnet
- Caldwell
- Calhoun
- Callahan
- Cameron
- Camp
- Carson
- Cass
- Castro
- Chambers
- Cherokee
- Childress
- Clay
- Cochran
- Coke
- Coleman
- Collin
- Collingsworth
- Colorado
- Comal
- Comanche
- Concho
- Cooke
- Coryell
- Cottle
- Crane
- Crockett
- Crosby
- Culberson
- Dallam
- Dallas
- Dawson
- DeWitt
- Deaf Smith
- Delta
- Denton
- Dickens
- Dimmit
- Donley
- Duval
- Eastland
- Ector
- Edwards
- El Paso
- Ellis
- Erath
- Falls
- Fannin
- Fayette
- Fisher
- Floyd
- Foard
- Fort Bend
- Franklin
- Freestone
- Frio
- Gaines
- Galveston
- Garza
- Gillespie
- Glasscock
- Goliad
- Gonzales
- Gray
- Grayson
- Gregg
- Grimes
- Guadalupe
- Hale
- Hall
- Hamilton
- Hansford
- Hardeman
- Hardin
- Harris
- Harrison
- Hartley
- Haskell
- Hays
- Hemphill
- Henderson
- Hidalgo
- Hill
- Hockley
- Hood
- Hopkins
- Houston
- Howard
- Hudspeth
- Hunt
- Hutchinson
- Irion
- Jack
- Jackson
- Jasper
- Jeff Davis
- Jefferson
- Jim Hogg
- Jim Wells
- Johnson
- Jones
- Karnes
- Kaufman
- Kendall
- Kenedy
- Kent
- Kerr
- Kimble
- King
- Kinney
- Kleberg
- Knox
- La Salle
- Lamar
- Lamb
- Lampasas
- Lavaca
- Lee
- Leon
- Liberty
- Limestone
- Lipscomb
- Live Oak
- Llano
- Loving
- Lubbock
- Lynn
- Madison
- Marion
- Martin
- Mason
- Matagorda
- Maverick
- McCulloch
- McLennan
- McMullen
- Medina
- Menard
- Midland
- Milam
- Mills
- Mitchell
- Montague
- Montgomery
- Moore
- Morris
- Motley
- Nacogdoches
- Navarro
- Newton
- Nolan
- Nueces
- Ochiltree
- Oldham
- Orange
- Palo Pinto
- Panola
- Parker
- Parmer
- Pecos
- Polk
- Potter
- Presidio
- Rains
- Randall
- Reagan
- Real
- Red River
- Reeves
- Refugio
- Roberts
- Robertson
- Rockwall
- Runnels
- Rusk
- Sabine
- San Augustine
- San Jacinto
- San Patricio
- San Saba
- Schleicher
- Scurry
- Shackelford
- Shelby
- Sherman
- Smith
- Somervell
- Starr
- Stephens
- Sterling
- Stonewall
- Sutton
- Swisher
- Tarrant
- Taylor
- Terrell
- Terry
- Throckmorton
- Titus
- Tom Green
- Travis
- Trinity
- Tyler
- Upshur
- Upton
- Uvalde
- Val Verde
- Van Zandt
- Victoria
- Walker
- Waller
- Ward
- Washington
- Webb
- Wharton
- Wheeler
- Wichita
- Wilbarger
- Willacy
- Williamson
- Wilson
- Winkler
- Wise
- Wood
- Yoakum
- Young
- Zapata
- Zavala
Page data updated