| Hydrologic Areas | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped Shape File |
| Hydrologic Subarea | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped Shape File |
| Hydrologic Units | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped Shape File |
| Monitoring Sites (AW) | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped Shape File |
| Region 3 Boundary | Water Resources | Central Coast Regional Water Quality Control Board | County of San Luis Obispo | | |  Zipped Shape File |
| Region 3 Hillshade | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped DEM File |
| Streams | Water Resources | Central Coast Regional Water Quality Control Board | Central Coast Region (3) | | |  Zipped Shape File |