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Web Tools

Web Tools provide interactive access to USGS information about California's water resources.

Filter Total Items: 29

Watershed Monitoring in Clear Lake Tributaries

Data viewer that allows users to see the streamflow and water quality monitoring sites at Clear Lake and its tributaries.  Data is from the USGS National Water Information System and California Department of Water Resources and Lake County databases. 

Lake Tahoe Hydro Mapper

The Hydro Mapper is an interactive map viewer which allows users to see real-time information on stream flow discharge, stage, nutrient, turbidity, sediment loads, and storage data. 

California Wildfires

Wildfires pose significant threat in an increasingly arid California landscape, threatening life, property, and air quality, and having long-term impacts on the state's water. Knowing the location and extent of wildfire events that effect California may help scientists and resource managers predict and manage potential impacts burns may have upon water quality, availability and movement.

The Mojave River: Lifeblood of the Desert

Take a 3D tour along the Mojave River and learn about its contribution to groundwater and surface water supply and the geologic characteristics that control it.

Bay-Delta Water Quality Survey, 2018 and 2020 Comparison

Delta Survey Data Visualization Contents for 2018 and 2020

From Snow to Flow (data visualization story)

A majority of the water in the western U.S. comes from snowmelt, but changes in the timing, magnitude, and duration of snowmelt can alter water availability downstream. This data visualization story explores what changing snowmelt means for water in the West, and how new USGS efforts can advance snow science by modeling snowpack and snowmelt dynamics and linking these results to streamflow.

Data Query for the Water Quality of San Francisco Bay Project

Since 1969, USGS has collected water-quality data along the deep-channel longitudinal axis of the San Francisco Bay-Delta system at 37 fixed locations spaced 3-6 kilometers apart. The Water Quality of San Francisco Bay Data Query provides access to the entire dataset.

Hydrogeology of the Adelaida Area, San Luis Obispo County, CA

The USGS is conducting a comprehensive evaluation of groundwater resources of the Adelaida area. Use this map to explore the hydrogeology of the area, including land use, geology, and USGS hydrologic data by watershed or water management district. 

Bay-Delta Regional Monitoring Program | Nutrient Mapping

Data visualization tool created for California's Bay-Delta Regional Monitoring Program.  This web applicaton visualizes nutrients and phytoplankton spatially and temporally.

Assessing Phytoplankton and Nutrient Abundance in the San Francisco Estuary and Delta

A data visualizatoin exploring the relationship between nutrient distribution and phytoplankton under different conditions across the San Francisco Delta and Estuary. Assessing distribution and abundance aids understanding of how managing nutrient supplies affects aquatic food webs, helping managers evaluate the potential environmental benefits of future nutrient reduction efforts agains

Domestic Wells in the United States

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater.