This interactive tool shows California groundwater level data, including depth below ground surface, groundwater elevation, and groundwater change in elevation. 

The California Data Exchange Center is a centralized database that stores, processes, and exchanges real-time hydrologic information on precipitation, river forecast, river stages/flow, snow, and reservoir storage conditions in California

The Integrated Water Portal is a map-driven data exploration and visualization tool that brings together water data from several agencies and allows users to quickly explore regional and local water conditions, focused mostly on surface and near surface supplies.

Groundwater and soil moisture drought indicators based on terrestrial water storage observations derived from GRACE satellite data and integrated with other observations, produced each week by NASA.

Monthly streamflow maps comparing percent of monthly average flow to their respective 1981-2010 average. Available in spring and summer for the western U.S.

A resource for information about the USDA Natural Resource Conservation Service's work relating to water quality and quantity.

Reports and data on streamflow, forecasts, reservoir storage and other hydrologic information for the Western United States.

The Climate Toolbox is a collection of web tools for visualizing past and projected climate and projected climate and hydrology of the contiguous United States of America.

WaterSense is a voluntary partnership program sponsored by EPA that provides resources on water-efficient products, new homes, and programs that meet EPA’s criteria for efficiency & performance.

The Experimental Surface Water Monitor provides forecasts and current conditions for soil moisture and cumulative runoff in the United States.