Serving San Jose
Groundwater & Basement Water Intrusion in San Jose, CA
Basement seepage, failed sumps, and hydrostatic pressure against the foundation are extracted and dried, and the path from the ground is identified so the loss does not repeat. Groundwater and basement seepage are extracted and dried only after the path from the soil is identified — a wall, a slab, a drain, or a failed sump. Drying the interior without stopping that path returns the same water to the same floor.
Frequently asked questions
The ground under this valley has dropped over the decades.
That is fair in a place this large. The ground runs from bay margin to valley floor to foothill within a single jurisdiction, and a remedy matched to one is frequently wrong for another. Establishing what is actually under a particular lot, with a couple of test holes, comes before deciding what to spend anything on.
The ground here has dropped over the years.
It has, measurably in places, as water was drawn from beneath it over decades. That is a slow regional process rather than anything wrong with a property, and it matters because grades set long ago may no longer fall the way they were designed to. Rechecking the fall around a building with a level rather than by eye settles it.
The creeks here are largely in engineered channels.
They are, straightened and lined through much of the city, which moves water away faster and gives it nowhere to spread. That works well up to the design flow and then stops abruptly rather than gradually. The mapping is drawn against the flow that exceeds it, which is a different number from what the channel carries daily.
The same questions, in context, on the San Jose mold removal page.