Surface Water Ambient Monitoring Program (SWAMP)

• Lower American River Bacteria Study: Get the latest monitoring results and learn about the bacteria source study.
• Recreational Water Quality Monitoring: Learn about the watersheds being monitored and see the most recent results.
• Harmful Algal Blooms: Learn about the Central Valley Water Board’s work to address harmful algal bloom (HABs).

• Program Overview
• Central Valley Regional SWAMP Activities
• Reports
• Data Access and Portals

Central Valley SWAMP Overview

• Annual Report Video for FY 23/24 (Video will open in YouTube)
• Program Overview information for Surface Water Ambient Monitoring Program (SWAMP)

About SWAMP

The Surface Water Ambient Monitoring Program (SWAMP) is tasked with assessing water quality in all of California's surface waters. The program conducts monitoring directly and through collaborative partnerships, and provides numerous information products, all designed to support water resource management in California. Find out more on the overall program available resources at the State Water Board's SWAMP website, including:

• The SWAMP Mission
• SWAMP IQ: Information Management and Quality Assurance Center
• Statewide Monitoring Programs
• Clean Water Team: Citizen Monitoring Program

Current Monitoring Projects:

• The Sacramento Watershed Coordinated Monitoring Program is a collaborative effort between the Central Valley Water Board and the Department of Water Resources (DWR) to monitor water quality trends in the Sacramento River Watershed. DWR conducts quarterly sampling events at monitoring sites along the Sacramento River main-stem and its tributaries.
  • This map provides access to the latest recreational water quality status and indicator bacteria monitoring results for the Sacramento Watershed
• Lower American River Bacteria Monitoring
• Recreational Water Quality Monitoring

Information on Pre 2015 SWAMP Studies:

• Webinar on Central Valley SWAMP Activities (May 6, 2010)
• Region-wide Studies
• Sacramento-San Joaquin River Delta
• Sacramento River Basin
• San Joaquin River Basin
• Tulare Lake Basin

Water Quality Reports & Fact Sheets

• The Central Valley Water Board supported preparation of a technical report on indicators and numeric thresholds for stream health indicators and nutrients in Central Valley streams. For a copy of the report, please contact Janis Cooke at Janis.Cooke@waterboards.ca.gov
  • Biostimulatory and Biointegrity Indicators and Thresholds in Modified Channels and Central Valley Streams Technical Report
  • Biostimulatory and Biointegrity Indicators and Thresholds Modified Channels and Central Valley Streams Supplemental Material
  • Central Valley Water Board Cover Letter to Accompany the Modified Channels Technical Report
• Central Valley SWAMP Water Quality Reports
• Historical Water Quality Reports (pre-2000)
• Additional SWAMP Reports

• CEDEN: The California Environmental Data Exchange Network integrates data from SWAMP and other Water Board programs.
• California Open Data Portal: Hosts open data collected by the state in a format that is easy to search, download, and combine.
• Water Data Library: Provides access to water quality data collected by the Department of Water Resources, including the Sacramento Watershed Coordinated Monitoring Program.
  • To download grab sample data, go to Data by Station Group and select "SWCMP" for a list of Sacramento Watershed stations.
  • To download continuous temperature data, go to Continuous Data and search by Station Number or Station Name.
• My Water Quality Portals