California Water Boards' Annual Performance Report - Fiscal Year 2018-19
TECHNICAL CONSIDERATIONS
- Data Source: SWAMP Database. Period: January 1995 - August 2019 .
- Unit of Measure: Number of sampling and analysis conducted events and data elements reviewed.
- Data Definitions: Sample Count: Represents each unique sample event for an individual station, project and date. One or more results types may be associated with a single sample event. Site visits (including sampling events): A visit to a monitoring station on a given day to make observations, take measurements, and/or collect water samples for analysis (known as a sampling event). Analyses: Samples taken during a site visit may undergo chemical, physical, toxicological, or biological analyses in the field or laboratory. While analyses address a wide range of parameters, from $3 pH measurements to $6,000 toxicity identification evaluations, each analysis reported here is counted the same, regardless of cost or complexity.
- References: The Water Boards' SWAMP Program
GLOSSARY
- Sampling Event
- During a site visit, multiple water samples or measurements may be collected from a specific water body site(s) to represent the water body as a whole, each of these represents a sampling event. These samples are then analyzed for specific parameters, either in the lab or field.
- Toxicity Test
- The word “toxicity” is used here to indicate a statistically significant adverse impact on standard aquatic test organisms in laboratory exposures. A number of different species, including crustaceans, algae, fish, and mollusks, have been used, following widely accepted test protocols with strict quality assurance. Toxicity test organisms are surrogates for aquatic species found in the environment. Toxicity tests are especially useful in water quality monitoring because they can detect the effects of all chemicals (whether measured or not) and respond to pollutant mixtures. These results may or may not have any relationship to human health. The test organisms have been chosen because they are relatively sensitive to toxic chemicals. Toxicity detected by these organisms might not acutely impact other types of organisms. Endpoints are the measured effects on test species (e.g., fish, crustaceans, etc.). All endpoints measured lethality (as % survival), except for cell counts for the algal population growth endpoint.
- Tissue Results
- Tissue results represents a single chemical parameter analyzed in the laboratory for a tissue part collected from a single site that may be created from a single organism, body part such as liver, or composite of multiple fish.
- Taxonomy Results
- Taxonomy results represents counts of a particular taxa identified in the laboratory and collected from a single site on a specific day. These counts may include benthic macro invertebrates, soft algae or diatom taxa.
- Field Results
- Field Results represent an individual measurement collected in the field from a single site on a specific day.
- Chemistry Results
- Chemistry results represent a single chemical parameter analyzed in the laboratory for each individual sediment or water sample from a single site on a specific day.
- Surface Water
- Waters naturally open to the atmosphere such as rivers, lakes, reservoirs, ponds, estuaries, and ocean. These waters form from collected water on the ground, and are naturally replenished through precipitation and naturally lost through evaporation and sub-surface seepage into the groundwater.
- Surface Water Ambient Monitoring Program (SWAMP)
- Water Board program responsible for coordinating all water quality monitoring conducted by the State and Regional Water Boards. In addition, SWAMP promotes collaboration with other entities by proposing conventions related to monitoring design, measurement indicators, data management, quality assurance, and assessment strategies, so that data from many programs can be used in integrated assessments.
