Learn more about how water is used in California and across the West for people, farms and the environment with one of our poster-size water maps – and today, on Earth Day, you can get these beautiful wall maps for 25% off the list price.

Use the discount code EARTHDAY19 at checkout. This 25% discount is good on all our maps, but only until midnight.

Our catalog of maps includes:

• The California Water map highlights the state’s rivers, lakes, reservoirs, wild and scenic rivers and other water features.
• Our California Groundwater map shows the basins around the state and explains how aquifers work.
• The Colorado River Basin map highlights the challenges facing an overworked river serving seven states and the country of Mexico.

We also have maps of the Sacramento-San Joaquin Delta, Klamath River Basin, Nevada and the San Joaquin River Restoration Program.