Soil Permeability by Address
View saturated hydraulic conductivity (Ksat) estimates by soil horizon for the mapped USDA components at an address.
Is this the right location? Drag the pin if Census placed it imprecisely.
Ksat is not an infiltration or perc test
USDA Ksat estimates describe how readily saturated soil transmits water. They are horizon-specific survey data—not a measured parcel infiltration rate or septic percolation test.
Conductivity changes with depth
Ksat is reported by horizon, so a faster surface layer can overlie a much slower subsoil. The focused chart preserves that vertical sequence for every component.
Ksat versus a perc test
Ksat is a soil-survey estimate of saturated transmission. A septic percolation test measures water movement under a locally defined field procedure and cannot be inferred from Ksat alone.
Why a property can show multiple results
The address resolves to a point inside a USDA map-unit polygon. That unit may contain several soil components in reported proportions, and the selected square foot is not directly sampled. The lookup therefore displays component percentages, attributes, and uncertainty together.
Source and limitations
Results come from USDA NRCS Soil Data Access and SSURGO after location matching through the U.S. Census Geocoder. Use them for research and screening, not as a replacement for field sampling, engineering, permitting, wetland delineation, or a septic perc test. Read the full methodology and data-source notes.