Short answer
Middletown has the best-drained ground in our Anderson-area sample: about 76% of sampled land is well drained, only 24% is rated very limited for basements, and the soil survey estimates a seasonal water table within about a foot under just 10% (USDA NRCS). Housing is older, with about 32% built before 1940 (Census ACS), so aging drains and roof water are the usual causes of leaks.
If you live in Middletown and your basement leaks, the odds favor an outside cause. The soil under most of town drains well, so water usually reaches a basement because something sends it there: a downspout, a sunken spot by the foundation, an old drain that’s failed, or a window well that fills.
Middletown in numbers
- 1955: median year homes were built (32% before 1940, 85% before 1980)
- 24% of sampled land rated very limited for basements
- 10% somewhat poorly to very poorly drained
- 10% with an estimated seasonal water table within about a foot, 24% within 3 feet
- 43.6 inches of precipitation a year at the nearest NOAA station
| Main soils in our sample | Share of points |
|---|---|
| Miami silt loam, gravelly substratum, 0 to 2 percent slopes | 70% |
| Losantville silt loam, 6 to 12 percent slopes, eroded | 10% |
| Orthents and aquents, loamy | 6% |
| Cyclone silty clay loam, 0 to 2 percent slopes | 6% |
| Celina silt loam, 2 to 6 percent slopes, eroded | 4% |
Census ACS 2024 5-year estimates. Soil figures are USDA NRCS soil-survey estimates for 50 random points inside Middletown’s Census boundary; they describe mapped areas, not any single lot, and “very limited” is a building-suitability rating, not proof that basements leak. Rainfall: NOAA 1991-2020 normals, Middletown 2 W station, about 2 miles away. Methods: data and methods.
The ground
Miami silt loam over gravelly material dominates our sample (70% of points), a well-drained soil on gently sloping ground. Losantville silt loam on steeper slopes adds more. About 76% of sampled land is well drained and 14% moderately well drained, with 10% poorly drained in low spots. The soil survey estimates a seasonal water table within about a foot at 10% of points and within 3 feet at 24%.
The houses
Middletown’s homes are older than most of the area’s: the median was built in 1955, about 32% predate 1940, 59% predate 1960 and 85% predate 1980 (Census ACS). Older foundations may be brick, early concrete or block, with clay footing drains and downspouts piped underground.
What tends to go wrong
- Water after storms where roof water reaches the foundation. See yard drainage.
- Seepage through old mortar joints and at the floor-wall joint as original drains fail.
- Leaks in late winter when snow piles against the walls and melts. See spring and snowmelt leaks.
- Cracks in older walls that let water through. See crack repair.
The local angle
Middletown gets more snow than most of the area: about 25.6 inches a year at the nearby Middletown 2 W station (NOAA 1991-2020 normals). On well-drained ground, snow piled against the foundation and melting window wells are a bigger share of the problem than groundwater. Keep snow shoveled away from the walls, cover window wells, and make sure downspout outlets aren’t frozen shut during a thaw.
What usually fixes it
Start outside with downspouts, grading, window wells and snow. Repair or reroute old underground downspout lines. Repoint failing mortar and seal leaking cracks. Drainage at the footing is the next step only if water still comes in after those fixes, which on this ground is less common than elsewhere in the area.
Guides to each fix: interior drain tile, sump pumps, battery backups, crack repair, bowing walls, exterior waterproofing, yard drainage. Prices are on the cost page.
Compare nearby
Anderson, Chesterfield. For the bigger picture, read why Anderson basements leak.
Match it to what you’re seeing first.