Soil series profile

Markey soil series

Markey is a very poorly drained soil with a mucky peat surface, mapped on 855,756 acres in 112 counties across 7 states. Hydrologic group A/D.

#237 by mapped area sandy or sandy-skeletal Terric Haplosaprists (Histosols)

Drainage class
Very poorly drained
100% of mapped acres
Hydrologic group
A/D
96% of mapped acres
Typical topsoil pH
6.0
moderately acidic · range 5.4–7.5
Mapped area
856k
acres in 112 counties, 7 states

Typical Markey profile

Texture and pH by depth

Typical Markey soil profile by depth 0 in 20 in 40 in 60 in 0–10 in · Oe1 · pH 6.0 Mucky peat 10–22 in · Oa2 · pH 6.0 Muck 22–31 in · Oa3 · pH 6.2 Muck 31–79 in · Cg · pH 6.5 · 1% clay Sand
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 Markey horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–10 in (Oe1) Mucky peat 6.0 Not reported Not reported 80%
10–22 in (Oa2) Muck 6.0 Not reported Not reported 75%
22–31 in (Oa3) Muck 6.2 Not reported Not reported 65%
31–79 in (Cg) Sand 6.5 1% 96% 0.25%

Representative values from the most extensive Markey map unit (Markey mucky peat, 0 to 1 percent slopes, survey area MI153). Other map units of this series vary within the series range.

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

What this means

What Markey soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Markey soils is moderately acidic: pH 6.0 (most land between 5.4 and 7.5). Many vegetables grow well here, and some gardens benefit from a little lime. Test before adding any.

Organic muck or peat is the most common topsoil (>99% of mapped Markey acres). It is rich and holds water, but is often wet, can be acidic, and settles when drained. The most common surface texture is muck (88% of mapped Markey acres).

100% of mapped Markey acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.

For lawns and yards

On >99% 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.

A seasonal high water table comes within 18 inches of the surface on 100% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.

For a septic system

For conventional septic absorption fields, NRCS rates >99% of the acres in mapped Markey soils very limited, 0% somewhat limited and 0% not limited.

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 Markey soil is found

Mapped acres

Markey is mapped in Minnesota, Wisconsin, Michigan, North Dakota, New York, Vermont and Maine. The 60 counties with the most Markey acres:

Counties with the most mapped Markey soil
County Acres Share of county land
Schoolcraft County, MI 85,438 11.4%
Beltrami County, MN 55,146 3.4%
Lake of the Woods County, MN 54,793 6.6%
Marinette County, WI 38,374 4.3%
Portage County, WI 32,136 6.2%
Wadena County, MN 27,826 8.1%
Oneida County, WI 27,273 3.8%
Dickinson County, MI 24,874 4.5%
Roseau County, MN 24,573 2.3%
Oconto County, WI 23,911 3.8%
Cass County, MN 22,422 1.7%
Shawano County, WI 21,774 3.8%
Aitkin County, MN 20,493 1.8%
Adams County, WI 18,597 4.5%
Koochiching County, MN 17,533 0.8%
Clare County, MI 16,020 4.4%
Waupaca County, WI 15,526 3.2%
Luce County, MI 15,436 2.7%
Mackinac County, MI 14,366 2.2%
Price County, WI 13,345 1.7%
Chippewa County, MI 13,072 1.3%
Stearns County, MN 12,986 1.5%
Morrison County, MN 12,503 1.7%
Douglas County, WI 12,302 1.5%
Marshall County, MN 10,797 0.9%
Anoka County, MN 10,637 3.9%
Todd County, MN 10,545 1.7%
Burnett County, WI 10,526 2.0%
Sherburne County, MN 9,865 3.5%
Dunn County, WI 7,994 1.5%
Iron County, WI 7,593 1.6%
Chippewa County, WI 7,416 1.2%
Vilas County, WI 7,376 1.3%
Washburn County, WI 7,045 1.4%
Menominee County, WI 6,552 2.9%
Door County, WI 6,266 1.9%
Forest County, WI 6,259 1.0%
Sawyer County, WI 6,230 0.8%
Rusk County, WI 5,698 1.0%
Clearwater County, MN 5,690 0.9%
Outagamie County, WI 5,541 1.4%
Leelanau County, MI 4,806 2.2%
Delta County, MI 4,789 0.6%
Kittson County, MN 4,268 0.6%
Polk County, MN 4,150 0.3%
Ashland County, WI 4,127 0.6%
Kewaunee County, WI 4,113 1.9%
Buffalo County, WI 3,940 0.9%
Langlade County, WI 3,822 0.7%
Alger County, MI 3,813 0.7%
Chisago County, MN 3,671 1.4%
Florence County, WI 3,102 1.0%
Crow Wing County, MN 2,906 0.5%
Lincoln County, WI 2,877 0.5%
Isanti County, MN 2,817 1.0%
Taylor County, WI 2,661 0.4%
Osceola County, MI 2,579 0.7%
Mahnomen County, MN 2,516 0.7%
Polk County, WI 2,484 0.4%
Pope County, MN 2,313 0.5%

Septic absorption fields

NRCS rating, share of Markey acres

Not limited 0%
Somewhat limited 0%
Very limited >99%
Not rated <1%
Septic tank absorption field rating across mapped Markey acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Markey acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited99.8%
Not rated0.2%

Drainage, water table and flooding

Share of Markey acres

Depth to seasonal high water table
About 0 inches (median where reported); within 18 inches on 100% of acres.
Flooding
Mapped as flooding on 2% of acres (0% occasional, 2% frequent).
Slope
Typically 0–1% (median 0%).
Topsoil organic matter
Median 70%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained 0%
Poorly drained 0%
Very poorly drained 100%
Drainage class across mapped Markey acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Markey acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained0.0%
Poorly drained0.0%
Very poorly drained100.0%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration 0%
D: very slow infiltration (clayey, shallow or wet) 0%
A/D: D as is, A if drained 96%
B/D: D as is, B if drained 4%
C/D: D as is, C if drained 0%
Not rated <1%
Hydrologic soil group across mapped Markey acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Markey acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration0.0%
D: very slow infiltration (clayey, shallow or wet)0.0%
A/D: D as is, A if drained95.6%
B/D: D as is, B if drained4.2%
C/D: D as is, C if drained0.0%
Not rated0.2%

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 Markey (component kind "Series") in SSURGO: 855,756 acres.
Method
Shares are by mapped acres of Markey components. The profile comes from the single largest Markey component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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