Water pathway

Where will rainwater go?

See whether the mapped soils in a survey area tend to let water move downward or create more runoff—and inspect the slope, drainage, storage, flooding, and ponding clues behind that story.

Choose a place

Survey area UT621

USDA data

Survey-area code

Enter two letters and three digits, such as UT621.

Find the code by county and state

State

County or parish

Search for every survey area overlapping the county.

This is a landscape-level screening view, not a prediction for a particular yard, storm, drain, or construction site.

Mapped tendencies

Rainwater story

Idle

Choose a survey area to explore its mapped rainwater indicators.

Quick read for —

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Absorb or shed?

Hydrologic soil groups

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Common drainage — —

Median slope — —

Available water storage — Top 100 cm of soil

Shallowest annual water table — —

Flooding indicated — Returned map-unit records

Ponding indicated — Returned map-unit records

Reading the letters

What groups A–D mean

A dual group such as C/D means the first letter applies when the soil is adequately drained and the second when it is undrained.

Inspect the returned map-unit records

Symbol	Map unit	Hydrologic group	Drainage	Slope %	Water storage cm	Water table cm	Flooding	Ponding %

Open general query lab

Method, source, and limitations

Hydrologic groups describe runoff potential for thoroughly wet, mapped soils. Actual water movement also depends on rainfall, land cover, grading, compaction, drains, and local topography.

Definitions follow the NRCS National Engineering Handbook, Part 630 .