St. Lawrence County, New York
The dominant drainage class is and the dominant hydrologic group is . This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in St. Lawrence County, New York.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 92K | ||||
| Potsdam-Tunbridge-Crary complex, 3 to 15 percent slopes, very bouldery | 68K | ||||
| Insula-Rock outcrop complex, rolling | 55K | ||||
| Muskellunge silty clay loam, 0 to 3 percent slopes | 54K | ||||
| Tunbridge-Lyman complex, 15 to 35 percent slopes, very rocky, very bouldery | 49K | ||||
| Colton-Duxbury-Adams complex, 3 to 15 percent slopes | 49K | ||||
| Insula-Rock outcrop complex, hilly | 48K | ||||
| Dawson-Fluvaquents-Loxley complex, frequently flooded | 43K | ||||
| Adjidaumo silty clay, 0 to 3 percent slopes | 41K | ||||
| Potsdam-Tunbridge complex, 15 to 35 percent slopes, very bouldery | 40K | ||||
| Hogansburg loam, 3 to 8 percent slopes | 40K | ||||
| Malone loam, 0 to 8 percent slopes, very stony | 33K | ||||
| Crary-Potsdam complex, 3 to 15 percent slopes, very bouldery | 33K | ||||
| Muskellunge silty clay loam, 3 to 8 percent slopes | 32K | ||||
| Potsdam very fine sandy loam, 3 to 15 percent slopes, very bouldary | 31K | ||||
| Naumburg loamy fine sand | 30K | ||||
| Hogansburg and Grenville soils, 0 to 8 percent slopes, very stony | 30K | ||||
| Swanton fine sandy loam | 29K | ||||
| Carbondale muck | 28K | ||||
| Borosaprists and Fluvaquents, frequently flooded | 27K |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
Most soils are reasonably suitable for conventional septic systems, though site-specific conditions always matter. Get a perc test to confirm.
Gardening & Agriculture
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.