Welcome to the California Regional Water Quality Control Board - Lahontan Welcome to the California Environmental Protection Agency
Governor's Website
My Water Quality
Performance Report

Monitoring In the Lahontan Region

Surface Water Ambient Monitoring Program (SWAMP)

Lake Tahoe Monitoring Programs, Tools & Reports

Groundwater Ambient Monitoring and Assessment (GAMA) Program

Note: This program is run by the State Water Board in Sacramento

Clean Water Team (CWT) - Citizen (Volunteer) Monitoring

Note: This program is run by the State Water Board in Sacramento