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Kansas Expansive Soil & Foundation Risk by County

105 counties mapped. On average, 45% of Kansas county soil area is high shrink-swell clay (USDA SSURGO).

Higher percentages mean more of a county's mapped soil is shrink-swell clay that expands and contracts with moisture. This is county-scale exposure, not a diagnosis of any single home — but it tells you whether soil movement belongs on your radar.

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CountyTierHigh-risk %Moderate %
MiamiSevere80%16%
AndersonSevere77%19%
CoffeySevere76%18%
OsageSevere75%20%
AllenSevere75%22%
DickinsonSevere74%20%
LyonSevere74%23%
MorrisSevere74%15%
FranklinSevere74%22%
GreenwoodSevere73%22%
ButlerSevere72%20%
JohnsonSevere72%20%
WoodsonSevere72%22%
MarionSevere72%24%
LinnSevere72%23%
MarshallSevere71%22%
RileySevere70%20%
ElkSevere70%21%
HarveySevere70%18%
McPhersonSevere69%22%
WilsonSevere68%25%
WabaunseeSevere68%23%
ChautauquaSevere67%20%
JacksonSevere66%33%
BourbonSevere66%29%
BrownSevere66%33%
HaskellSevere65%24%
LabetteSevere64%32%
NeoshoSevere64%28%
WashingtonSevere64%28%
ChaseSevere64%24%
GearySevere64%21%
RepublicSevere62%28%
PottawatomieSevere61%29%
AtchisonSevere61%36%
LaneSevere61%27%
MitchellSevere60%22%
NemahaSevere60%38%
ShawneeSevere59%30%
MontgomerySevere59%30%
CowleySevere58%31%
GreeleySevere58%34%
RushSevere58%35%
GraySevere58%18%
LeavenworthSevere58%36%
CloudSevere57%26%
CrawfordSevere56%38%
ClaySevere55%33%
FordSevere54%30%
BartonSevere54%26%
DouglasSevere53%36%
JeffersonSevere53%40%
WichitaSevere53%41%
PawneeSevere52%22%
HodgemanSevere52%35%
NessSevere50%36%
OsborneSevere47%26%
SumnerSevere47%33%
ScottSevere47%42%
RiceSevere45%26%
SedgwickSevere44%27%
SalineSevere44%40%
EllisSevere44%23%
JewellSevere44%42%
StantonSevere43%44%
OttawaSevere41%46%
EllsworthSevere40%38%
WyandotteSevere38%41%
CherokeeSevere38%53%
FinneySevere38%33%
RussellSevere36%31%
MeadeSevere35%32%
EdwardsSevere33%17%
LincolnSevere32%41%
KearnyHigh28%35%
RooksHigh28%47%
HamiltonHigh28%21%
TregoHigh27%43%
KiowaHigh26%26%
SmithHigh26%58%
PrattHigh25%26%
SewardHigh25%26%
RenoHigh23%26%
BarberHigh22%28%
GrantHigh20%53%
StaffordHigh20%12%
ClarkHigh19%31%
MortonHigh19%45%
DoniphanModerate14%74%
GoveModerate11%63%
HarperModerate10%48%
KingmanModerate9%34%
StevensModerate7%57%
PhillipsModerate6%80%
ComancheLow5%35%
ThomasLow4%89%
WallaceLow4%65%
LoganLow4%67%
DecaturLow3%66%
ShermanLow3%78%
GrahamLow3%76%
CheyenneLow2%44%
NortonLow2%82%
RawlinsLow2%61%
SheridanLow2%83%

Risk metrics are computed from USDA SSURGO soil survey data (linear extensibility of soil components, area-weighted by county). Soil varies lot to lot — this is county-scale context, not a substitute for a site-specific geotechnical or structural assessment.