Soil series profile

Rumple soil series

Rumple is a well drained soil with a gravelly clay loam surface, mapped on 191,706 acres in 12 counties in TX. Hydrologic group D.

#1902 by mapped area clayey-skeletal Typic Argiustolls (Mollisols)

Drainage class: Well drained
Hydrologic group: D
Typical topsoil pH: 7.0
Mapped area: 192k

Typical Rumple profile

Texture and pH by depth

Depth to scale. More strongly shaded layers hold more clay. Horizon names are the soil survey's (A = topsoil, B = subsoil, C = parent material).

Show as a table

Typical Rumple horizons (representative values)
Depth	Texture	pH	Clay	Sand	Organic matter
0–5 in (A)	Gravelly clay loam	7.0	32%	30%	4%
5–10 in (Bt1)	Gravelly clay loam	7.0	37%	26%	2.2%
10–26 in (Bt2)	Extremely gravelly clay	7.3	65%	20%	2%
26–59 in (R)	Bedrock	Not reported	Not reported	Not reported	Not reported

Representative values from the most extensive Rumple map unit (Rumple gravelly clay loam, 1 to 8 percent slopes, survey area TX411). Other map units of this series vary within the series range.

Stock photo for illustration, not a sample of this soil series. Credit on the Sources & method page.

What this means

What Rumple soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Rumple soils is neutral: pH 7.0, the range most vegetables, flowers and lawn grasses prefer.

Loamy topsoil (loam, silt loam and similar) covers 96% of mapped Rumple acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is gravelly clay loam (62% of mapped Rumple acres).

>99% of mapped Rumple acres is moderately well to excessively drained, which suits most garden plants.

For lawns and yards

On 96% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.

For a septic system

For conventional septic absorption fields, NRCS rates 96% of the acres in mapped Rumple soils very limited, 0% somewhat limited and 0% not limited (4% not rated, such as urban land, pits or water).

Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.

Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.

Generated from the mapped numbers above using fixed rules, not a site visit. See how these notes are written.

Where Rumple soil is found

Mapped acres

Rumple is mapped in Texas.

Counties with the most mapped Rumple soil
County	Acres	Share of county land
San Saba County, TX	90,821	12.5%
Comal County, TX	38,085	8.8%
Hays County, TX	30,472	8.5%
McCulloch County, TX	24,469	3.6%
Llano County, TX	5,787	1.0%
Mason County, TX	1,673	0.3%
Lampasas County, TX	150	0.0%
Blanco County, TX	78	0.0%
Burnet County, TX	54	0.0%
Kerr County, TX	45	0.0%
Kendall County, TX	43	0.0%
Bexar County, TX	29	0.0%

Septic absorption fields

NRCS rating, share of Rumple acres

Not limited 0%

Somewhat limited 0%

Very limited 96%

Not rated 4%

Septic tank absorption field rating across mapped Rumple acres. Scale 0 to 100% of mapped land.

Show as a table

Septic tank absorption field rating across mapped Rumple acres.
Category	Share of acres
Not limited	0.0%
Somewhat limited	0.0%
Very limited	96.1%
Not rated	3.9%

Drainage, water table and flooding

Share of Rumple acres

Depth to seasonal high water table: None reported within about 6.5 feet (median where reported).
Flooding: Not mapped as flooding on most acres.
Slope: Typically 4–5% (median 4%).
Topsoil organic matter: Median 4%.

Drainage class

Excessively drained 0%

Somewhat excessively drained 0%

Well drained >99%

Moderately well drained 0%

Somewhat poorly drained 0%

Poorly drained 0%

Very poorly drained 0%

Not rated <1%

Drainage class across mapped Rumple acres. Scale 0 to 100% of mapped land.

Show as a table

Drainage class across mapped Rumple acres.
Category	Share of acres
Excessively drained	0.0%
Somewhat excessively drained	0.0%
Well drained	99.1%
Moderately well drained	0.0%
Somewhat poorly drained	0.0%
Poorly drained	0.0%
Very poorly drained	0.0%
Not rated	0.9%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%

B: moderate infiltration 0%

C: slow infiltration <1%

D: very slow infiltration (clayey, shallow or wet) 95%

A/D: D as is, A if drained 0%

B/D: D as is, B if drained 0%

C/D: D as is, C if drained 0%

Not rated 4%

Hydrologic soil group across mapped Rumple acres. Scale 0 to 100% of mapped land.

Show as a table

Hydrologic soil group across mapped Rumple acres.
Category	Share of acres
A: fast infiltration (mostly sandy or gravelly)	0.0%
B: moderate infiltration	0.0%
C: slow infiltration	0.8%
D: very slow infiltration (clayey, shallow or wet)	95.3%
A/D: D as is, A if drained	0.0%
B/D: D as is, B if drained	0.0%
C/D: D as is, C if drained	0.0%
Not rated	3.9%

Sources & data dates

Source: USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
Data date: SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
Scope: All map unit components named Rumple (component kind "Series") in SSURGO: 191,706 acres.
Method: Shares are by mapped acres of Rumple components. The profile comes from the single largest Rumple component. Full methodology.

Independent reference site. No government affiliation or endorsement.

Full narrative description: USDA Official Soil Series Description for Rumple.