There is a misconception that the Paso Robles Groundwater Basin is recharged by rainfall. Is this rainfall sufficient enough to sustain the existing groundwater demand? When I was on the Planning Commission, I received the study mentioned in the next paragraph.
The U.S. Geological Survey Open File Report 00-477, 1997, identifies land surface displacement caused by aquifer-system compaction in the Paso Robles Area related to the groundwater depressions. This relates to the condition of the basin aquifers being confined or semiconfined and, in turn, the probability that rainfall reaches the water table in a timely manner, if at all.
The progressing groundwater depressions since 1997 indicate that sustainability of the basin storage has not been demonstrated. The question is whether groundwater mining is taking place? And shouldn’t the Geological Survey be requested to review their basin study and bring the study up to date?