County soil summary
Soil types in York County, Maine
The most widespread soils are Hermon, Lyman and Skerry; the most common drainage class is somewhat excessively drained (30% of the land), and typical topsoil pH is 4.8.
- Well or moderately well drained
- 64% of land · state 58%
- Typical topsoil pH
- 4.8 very strongly acidic · state 4.6
- Septic fields very limited
- 96% of land · state 96%
- Subject to flooding
- 5% of land, any frequency · state 2%
Most common soils in York County
Share of mapped land
A county is a patchwork of many soils. These 8 cover 60% of the mapped land; 60 named soil series are mapped here in all.
| Soil | Share of land | Drainage | Topsoil pH |
|---|---|---|---|
| Hermon | 11.4% | Somewhat excessively drained | 4.4 |
| Lyman | 10.8% | Somewhat excessively drained | 4.0 |
| Skerry | 8.4% | Moderately well drained | 5.2 |
| Adams | 8.0% | Somewhat excessively drained | 4.8 |
| Naumburg | 6.3% | Poorly drained | 4.6 |
| Colton | 5.5% | Excessively drained | 5.0 |
| Brayton | 5.0% | Poorly drained | 4.0 |
| Croghan | 4.6% | Moderately well drained | 4.8 |
What this means
What the soils in York County mean for gardens, lawns and septic systems
For your garden
Typical topsoil in York County is very strongly acidic: pH 4.8 (most land between 4.0 and 6.0). Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.
Loamy topsoil (loam, silt loam and similar) covers 67% of the land: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is fine sandy loam (27% of the land).
36% of the land is excessively or somewhat excessively drained: water moves through fast, so gardens need more frequent watering in dry spells.
For your lawn and yard
On 62% of the land, 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 34% of the land, 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 96% of the land in York County very limited, 4% somewhat limited and 0% not limited.
That is close to the state as a whole (96% very 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.
Flooding is mapped on 5% of the land (<1% occasional, 2% frequent).
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Drainage
How long the soil stays wet
The most common drainage class is somewhat excessively drained (30%). 64% of the land is moderately well drained or better, compared with 58% across Maine.
Show as a table
| Category | York County | Maine |
|---|---|---|
| Excessively drained | 5.9% | 4.0% |
| Somewhat excessively drained | 30.2% | 13.3% |
| Well drained | 7.5% | 19.2% |
| Moderately well drained | 20.2% | 21.5% |
| Somewhat poorly drained | 4.3% | 14.4% |
| Poorly drained | 20.2% | 16.3% |
| Very poorly drained | 8.2% | 10.3% |
| Not rated | 3.4% | 0.9% |
Septic absorption fields
NRCS rating for conventional drain fields
The rating looks at the soil from 24 to 60 inches deep: permeability, depth to a seasonal water table or bedrock, flooding and slope. “Very limited” means at least one feature is unfavorable enough that a conventional field is hard to make work.
Show as a table
| Category | York County | Maine |
|---|---|---|
| Not limited | 0.0% | 0.0% |
| Somewhat limited | 4.2% | 3.3% |
| Very limited | 95.7% | 96.4% |
| Not rated | 0.1% | 0.3% |
Rain, runoff and water table
Hydrologic soil group, flooding, seasonal water table
Hydrologic soil group
How fast rain soaks in when the soil is already wet. Group A soaks in fastest, D slowest.
Show as a table
| Category | York County | Maine |
|---|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 30.1% | 8.1% |
| B: moderate infiltration | 3.6% | 5.0% |
| C: slow infiltration | 9.6% | 13.6% |
| D: very slow infiltration (clayey, shallow or wet) | 25.1% | 42.6% |
| A/D: D as is, A if drained | 13.5% | 2.9% |
| B/D: D as is, B if drained | 1.6% | 3.7% |
| C/D: D as is, C if drained | 12.1% | 22.1% |
| Not rated | 4.4% | 1.9% |
Flooding
Show as a table
| Category | York County | Maine |
|---|---|---|
| No flooding | 95.0% | 97.6% |
| Rare or very rare | 2.3% | 0.1% |
| Occasional | 0.3% | 0.5% |
| Frequent or very frequent | 2.4% | 1.4% |
| Not reported | 0.0% | 0.4% |
Seasonal high water table
Show as a table
| Category | York County | Maine |
|---|---|---|
| Within 18 inches at some time of year | 33.8% | 46.6% |
| 18 inches to 3.3 feet | 18.7% | 20.0% |
| Deeper than 3.3 feet or none reported | 47.5% | 32.9% |
| Not reported | 0.0% | 0.4% |
Topsoil pH and texture
First mineral layer of each soil
Typical topsoil pH is 4.8 (very strongly acidic); 80% of rated land falls between 4.0 and 6.0. Median topsoil organic matter is 5%.
Show as a table
| Category | York County | Maine |
|---|---|---|
| Strongly acidic (below 5.5) | 71.5% | 75.3% |
| Moderately to slightly acidic (5.5–6.4) | 16.9% | 7.7% |
| Near neutral (6.5–7.3) | 0.1% | 0.1% |
| Alkaline (7.4 and up) | 0.0% | 0.0% |
| Not reported | 11.5% | 16.9% |
Texture
Show as a table
| Category | York County | Maine |
|---|---|---|
| Sandy | 21.2% | 3.4% |
| Loamy (loam, silt loam and similar) | 66.7% | 76.6% |
| Clayey (40%+ clay) | 0.0% | 0.0% |
| Organic (muck or peat) | 8.0% | 17.6% |
| Not reported (rock, urban land, etc.) | 4.0% | 2.4% |
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
- York County, Maine (FIPS 23031): 640,000 acres of mapped land, 16,844 acres of open water excluded. State comparisons pool all mapped land in Maine.
- Method
- Shares are by mapped land area: each map unit’s acres in the county times each soil component’s percentage. Open water is excluded. Topsoil values use the first mineral horizon of each component. Full methodology.