Temecula Hydrogeology

Science Center Objects

This site provides hydrologic data collected or compiled by the USGS for the Temecula area; some additional data may be available from the USGS database National Water Information System (NWIS).

Map overview of monitoring well sites

Installation of multiple-depth monitoring well site for Temecula.

The focus of this study is to advance knowledge of the hydrologic system in the upper basin of the Santa Margarita Watershed. Much of this knowledge will be gained from development and calibration of a linked surface-water and ground-water flow model of the upper basin.

Primary objective is to develop a more complete understanding of the hydrogeologic system in the upper basin of the Santa Margarita Watershed as an aid in achieving an amicable resolution of the present water-rights controversy without resorting to expensive litigation encompassing both the surface-water and ground-water systems in the upper basin.

Multiple-depth monitoring wells provide critically important data to aid in understanding complex hydrogeology, such as that found in the Temecula area. A major element of the present USGS study is to install multiple-depth wells throughout the Temecula-Murrieta groundwater basin in order to map the subsurface geologic layers, to define water-quality differences with depth, and to provide longterm monitoring of groundwater levels. These data will aid local water agencies in optimal management of the basin.

The well will be about 1,000 feet deep, and will have six separate PVC piezometers, installed to selected depths. These piezometers will be monitored for groundwater levels and sampled for groundwater quality. The well site will be a permanent installation and will provide data for decades.


For more information on hydrologic studies in the Temecula area, please visit the project website.