NC Division of Water Resources

Groundwater Level Monthly Statistics

plot of historical monthly water levels versus year of interest
Well: GG3i
part of the Western Carolina Hydrological Research Station Network

Statistical curves are monthly minimum, mean, & maximum of the record through 2023. Red points are 2024, latest date in month data. Statistics based on all WCHRS data for well.

Choose Plot Type: Calendar Year Current Month & Prior Year
Min-Mean-Max
Percentile Distribution
DMAC Percentile Distribution
Select Ending Year of Interest (red points):
Select the last year for statistical curves:

Plot will redraw with each selection change.

A distinctive feature of this plot is the drop in groundwater levels associated with April - May - June (and sometimes longer) time period. This is when evapo-transpiration typically exceeds rainfall which leads to less recharge and a decline in groundwater levels. Recovery of groundwater levels usually begins in October - November (and sometimes later) when precipitation begins to exceed evapo-transpiration.