Please note (02/09/2018): due to changes in the DWR's network and server configuration, portions of the Water Data Library portal may not function properly. We are working to resolve any issues with the site as soon as possible. The station map below currently works only with Chrome, Edge, and Safari browsers. If you receive an error message, please try one of these browsers to access the WDL site. If you have a specific data request, please refer to our contacts page. Thank you for your patience.

Use the map below to locate monitoring stations. You can find an area of interest if you zoom and pan the map. Use the search gox below to find features on the map such as the name of a city, park, landmark, lake, water feature, or zip code within California. Additional searches by data type are possible by clicking the links on the left. For help on these and other ways to find your data click here.