Adelaida Area Hydrogeologic Study

USGS Adelaida Study Website

Evaluation of Groundwater Resources in the Adelaida Area of San Luis Obispo County, California

Background Information

Background information on the Adelaida area groundwater study

County Board of Supervisors Meeting - June 8, 2021 @ 9:00 a.m.

Agenda item 35 - Request for direction regarding conducting a hydrogeologic study of the Adelaida area; and find that the project is exempt from Section 21000 et seq. of the California Public Resources Code (CEQA). Districts 1 and 5.

  • Click here to view the staff report and supporting documents.
  • Click here to view the agenda and instructions to participate in the virtual meeting.

Community Meetings

On Friday, April 23, 2021 at 4:00 p. m., an online community meeting was held where USGS staff provided an update on the Adelaida area groundwater study. The focus of the meeting was to provide a summary of work completed for the initial data collection task and next steps for the study. 

A recording of this meeting is available at the link below:

Meeting material:

On Thursday, August 6, 2020 at 4:00 p.m., the RCD hosted an online community meeting where USGS provided an update on the study and detailed how the community can participate in the initial data collection process. USGS reviewed data of interest for the study, including well construction information, groundwater level data, water use information, groundwater chemistry data, and geological data.

A recording of this meeting is available at the link below:

Meeting material:

Interactive Map of the USGS Adelaida Study Area

Click here to access the Interactive Data Viewer for the USGS Adelaida study area. This is an interactive mapping system to help you navigate around the study area by panning, zooming, or searching for a specific parcel or street address that you would like to locate. There are different map layers that can be shown and superimposed in this interactive mapping system such as boundaries of groundwater basins, cities, roads, or other entities by checking the layer names indicated on the left panel layer menu.

To search and locate a specific APN or street address on the map:

  1. Enter either the nine-digit parcel number (APN) including hyphens or the complete street address in the “Search...” bar on the upper right-hand corner of the map screen and then click on the search button to locate it. The APN or street address that you just entered will appear on the left panel and a location marker will show up on the map to identify the location.
  2. Click on the APN or street address name shown on the left panel layer menu will zoom in to the specified location for a close-up look.

Mailing List

To receive email notifications and updates on the Adelaida area hydrogeologic study, please join the mailing list by clicking here.

Frequently Asked Questions

Contact Public Works via web form, email, or call us at (805) 781-5252.