Middle St. Johns - Florida Department of Environmental Protection

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246 Water Quality Assessment Report: Middle St. Johns Aquatic Life Use Support-Based Attainment Primary Contact and Recreation Attainment Fish and Shellfish Consumption Attainment Drinking Water Use Attainment and Protection of Human Health Table E.1 summarizes the designated uses assigned to Florida’s various surface water classifications. Table E.1: Designated Use Attainment Categories for Surface Waters in Florida Designated Use Attainment Category Used in Impaired Surface Waters Rule Evaluation Applicable Florida Surface Water Classification Aquatic Life Use Support-Based Attainment Class I, II, and III Primary Contact and Recreation Attainment Class I, II, and III Fish and Shellfish Consumption Attainment Class II Drinking Water Use Attainment Class I Protection of Human Health Class I, II, and III Sources of Data The Department’s assessment of water quality for each basin statewide includes an analysis of quantitative data from a variety of sources, many of which are readily available to the public. These sources include the EPA’s Legacy and modernized STOrage and RETrieval (STORET) databases, the U.S. Geological Survey (USGS), the Department, the Florida Department of Health (DOH), the water management districts, local governments, and volunteer monitoring groups. Historically, the Department carried out statewide water quality assessments using data available in the EPA’s Legacy STORET Database; STORET makes up approximately 60 percent of the statewide data used in the 2002 Impaired Surface Waters Rule assessment. The Legacy STORET dataset is a repository of data collected and uploaded by numerous organizations through 1999. The Legacy STORET Database can be accessed at http://www.dep.state.fl.us/water/storet/index.htm. In 2000, the EPA created a modernized version of STORET that included new features designed to address data quality assurance/quality control concerns (see the new STORET Web site at www.epa.gov/storet/). However, because of software difficulties associated with batch uploading of data to the modernized STORET, the data being uploaded to the national repository decreased dramatically, and lingering problems have temporarily reduced STORET’s importance as a statewide data source. It houses only about 5 percent of the statewide Impaired Surface Waters Rule 2002 Database. Approximately 35 percent of the data used in the 2002 Impaired Surface Waters Rule assessment was provided by individual organizations that for various reasons, such as time constraints or resource limitations, were not able to enter their data into the national database. The organizations providing the largest datasets include the South Florida, Southwest Florida, and St. Johns River water management districts; the USGS; and the University of Florida LakeWatch volunteer monitoring group. Several of these databases
Water Quality Assessment Report: Middle St. Johns 247 are readily available to the public via the Internet: the South Florida Water Management District at http://www.envirobase.usgs.gov/, the USGS at http://water.usgs.gov/, and LakeWatch at http://lakewatch.ifas.ufl.edu/. The Impaired Surface Waters Rule 2002 Database was created to evaluate data simultaneously in accordance with the Impaired Surface Waters Rule methodology for every basin in the state, based on the appropriate data “window.” For the Verified List assessment, the window is 7.5 years (for the Impaired Surface Waters Rule 2002 Database), and the Planning List assessment window is 10 years. Table E.2 shows the periods of record for the Verified and Planning Lists for the five basin groups. The evaluation of water quality in the state’s basins also includes some qualitative information. These sources are described in the Basin Status Reports and Assessment Reports for each basin. Table E.2: Data Used in Developing the Planning and Verified Lists, First Basin Rotation Cycle Basin Group Reporting Period of Data Record Used in Impaired Surface Waters Rule Evaluation Group 1 Planning List January 1, 1989 – December 31, 1998 Verified List January 1, 1995 – June 30, 2002 Group 2 Planning List January 1, 1991 – December 31, 2000 Verified List January 1, 1996 – December 31 2002 Group 3 Planning List January 1, 1992 – December 31, 2001 Verified List January 1, 1997 – December 31, 2003 Group 4 Planning List January 1, 1993 – December 31, 2002 Verified List January 1, 1998 – December 31 2004 Group 5 Planning List January 1, 1994 – December 31, 2003 Verified List January 1, 1999 – December 31, 2005 Notes: Typically, a 10-year data record is used for the development of the Planning Lists, and a 7-year record is used for the Verified Lists. If necessary, however, the data record for the Verified listing can be extended by up to 6 months to complete a monitoring period that will provide sufficient information to make a listing determination. This 6-month extension applies to the development of the Impaired Surface Waters Rule 2002 Database. Methodology To determine the status of surface water quality in individual river basins in Florida, three categories of data—chemistry data, biological data, and fish consumption advisories—were evaluated to determine potential impairments for the four attainment of designated use categories discussed earlier: aquatic life, primary contact and recreation, fish and shellfish consumption, and drinking water use and protection of human health. Aquatic Life Based Attainment The Impaired Surface Waters Rule follows the principle of independent applicability. A waterbody is listed for potential impairment of aquatic life use support based on exceedances of any one of four types of water quality indicators (numeric water quality criteria, nutrient thresholds, biological thresholds, and toxicity data).
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Middle St. Johns - Florida Department of Environmental Protection

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