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SWAMP - Sacramento-San Joaquin River Delta

To request a copy of documents listed on this page, please contact Jessica Rader at

Support for the Delta Regional Monitoring Program

Central Valley Water Board SWAMP staff and resources are helping support the Bay Delta Team and the development of a Delta Regional Monitoring Program. The primary goal of the Delta RMP is to provide coordinated monitoring, reporting, and assessment of water quality throughout the Sacramento-San Joaquin Delta.

Harmful Cyanobacteria Blooms

In 2011 the University of California, Santa Cruz completed a study on harmful cyanobacteria blooms in Clear Lake and the Sacramento-San Joaquin Delta. More information on this study is available on the Sacramento River Basin page.

Sources of Pyrethroid Insecticides to Cache Slough

Monitoring was conducted in 2011 and 2012 to collect information on the sources of pyrethroid insecticides to Cache Slough during spawning of the Delta smelt. Monitoring was conducted by the University of California, Berkeley and coordinated with the California Department of Water Resources and the Interagency Ecological Program.

Sources and Toxicity of Pyrethroids to the Delta

In 2008 and 2009, SWAMP funded a University of California, Berkeley study to assess the potential for aquatic life beneficial use impairment in the Delta due to the occurrence and toxicity of pyrethroid pesticides in the water column. Monitoring included both ambient Delta sites and major discharges, including stormwater drains, agricultural drains, and municipal wastewater treatments plants.

Delta Toxicity Tools Development

  • Toxicity Mixing
    In 2010, SWAMP funded a University of California, Davis study to assess the mixture toxicity of key contaminants of concern in the Delta. In 2011, SWAMP augmented the study to include more testing on pyrethroid insecticides.
    • Final Report

  • Sediment Toxicity Identification Evaluation (TIE)
    Another University of California, Davis study funded by SWAMP focused on developing improved methods for extracting and identifying organic chemicals from toxic sediments.
    • Final Report