Static Water Level
Definition
Static water level (SWL) is the depth from the surface to the top of the water column in a well under non-pumping (static) conditions. It is measured after the well has rested long enough for the water level to stabilize — typically several hours after any pumping has stopped. The static water level is recorded at the time of well completion and documented in the well log. It fluctuates seasonally with rainfall and snowmelt, and over time with long-term water table trends or drought conditions. Monitoring static water levels over time provides early warning of a declining water table or well performance issues.
Frequently Asked Questions
Why Static Water Level Matters
How Trident Drilling Company Uses It
Trident Drilling records static water level at well completion as part of the standard well log. During well inspections, current static water level is compared to the original recorded level to assess well health and long-term performance trends.