Middle St. Johns - Florida Department of Environmental Protection

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76 Water Quality Assessment Report: Middle St. Johns Table 3.5: Integrated Water Quality Assessment Summary for the Alexander Springs Creek Planning Unit WBID Waterbody Segment 2917 South Grasshopper Lake 2918A Alexander Springs Drain Waterbody Type 1 Class 2 1998 303(d) List Parameters of Concern Data Evaluation under the Impaired Surface Waters Rule Criteria 3 Potentially Impaired (Cat. 3c) for Listed Parameters 4 Verified Impaired (Cat. 4a, 4b, 4c, or 5) for Listed Parameters 5 Not Impaired (Cat. 2) for Listed Parameters Lake IIIF 3b Stream IIIF 3a 2918B Buck Lake Lake IIIF Coliform Bacteria 2918C Sellers Lake Drain Fecal Coliform Bacteria, Total Coliform Bacteria Lake IIIF DO, Nutrients (TSI), Turbidity 2918D Echo Lake Lake IIIF 3a 2918E Farles Prairie Lake IIIF 3b 2918F 2918Z Buck Lake Drain Alexander Springs 2927 Alexander Spring Creek Lake IIIF 3a Stream IIIF 3b Stream IIIF 3a 2930 Lulu Lake Lake IIIF 3b 2930A Akron Lake Lake IIIF DO, Nutrients (TSI), Turbidity 2930C Glenn Branch Stream IIIF 3a 2930D Blue Lake Lake IIIF Nutrients (TSI) 2930E Silver Paisley Lake 2932 Lake Kathryn Canal Lake IIIF Nutrients (TSI) Lake IIIF 3a 2932A Lake Kathryn Lake IIIF 3a DO EPA’s 305(b)/ 303(d) Integrated Report Assessment Category for WBID 6 3c 2 2 2 2 Notes: 1 The designation “stream” includes canals, rivers, and sloughs. The designation “lake” includes some marshes. 2 The state’s surface water classifications are as follows: Class I: Potable water supplies Class II: Shellfish propagation or harvesting Class III: Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife Class IV: Agricultural water supplies Class V: Navigation, utility, and industrial use (there are no state waters currently in this class)
Water Quality Assessment Report: Middle St. Johns 77 Table 3.5 (continued) 3 The EPA’s 305(b)/303(d) Integrated Report categories are as follows: 1—Attains all designated uses; 2—Attains some designated uses; 3a—No data and information are available to determine if any designated use is attained; 3b—Some data and information are available, but they are insufficient for determining if any designated use is attained; 3c—Meets Planning List criteria and is potentially impaired for one or more designated uses; 4a—Impaired for one or more designated uses and the TMDL is complete; 4b—Impaired for one or more designated uses but no TMDL is required because the impairment is not caused by a pollutant; 4c—Impaired for one or more designated uses, but no TMDL is required because an existing or proposed pollutant control mechanism provides reasonable assurance that the water will attain standards in the future; and 5—Water quality standards are not attained and a TMDL is required. 4 Parameters in bold meet the Verified List evaluation criteria, Section 62-303.400, F.A.C. 5 Parameters in italics are in Category 4 (a, b, or c) waters that do not require TMDL development. 6 The assessment categories listed in this column represent the status of each WBID as a whole, based on multiple parameters. The hierarchy for assigning these categories is Category 5, then 4, then 3c, then 2, and then 3b, i.e., each WBID is assigned a category based on the highest category assigned to an individual parameter. For example, if WBID 9999 has total coliforms as Category 5, fecal coliforms as Category 3c, and coliforms-shellfish as Category 2, the single assessment call for the WBID is Category 5. F = Fresh water M = Marine DO = Dissolved oxygen TSI = Trophic State Index for less than 0.100 million gallons per day (mgd), and none discharges to surface waters (not National Pollutant Discharge Elimination System [NPDES] permitted). Permitted discharges range from 0.055 to 0.0900 mgd. The Country Squire Motor Home Vehicle is allowed the largest discharge, 0.055 mgd, into percolation ponds. The smallest allowed discharges are at Spring Creek Elementary School and the U.S. Naval Tracking Station. Each is allowed 0.0090 mgd and discharges into a drainage field and percolation pond, respectively. The only other facility is Alexander Springs Recreational Center, which discharges 0.0300 mgd into a drainfield. Appendix G lists, by planning unit, the permitted dischargers in the basin. There are no other point source discharges in the planning unit. Nonpoint Sources. Most of the Alexander Springs Creek planning unit is relatively undeveloped. Major land uses are upland forest (78 percent), wetlands (14 percent), and water (4 percent). Much of the planning unit’s land area lies within the boundaries of the Ocala National Forest. Urban and built-up land accounts for less than 3 percent of the land area, and agricultural land use covers about 1 percent of the planning unit. These developed land uses can be associated with nonpoint discharges of pollutants and eroded sediments (see sidebar for a description of nonpoint sources of pollution related to land uses and Noteworthy for an atmospheric deposition). Appendix H provides a detailed analysis of land use in the basin, by planning unit. Ecological Summary Two rare and imperiled aquatic species occur in the planning unit. The dense hydrobe snail (Aphaostracon pyncus, Thompson) is found in Alexander Springs Run in the Ocala National Forest. The bluenose shiner (Pteronotropis welaka) has also been observed in Alexander Springs. Nonpoint Sources and Land Uses Rainfall generates stormwater runoff. As it flows over the land and through the ground, runoff may carry nonpoint source pollutants from many different sources to lakes, rivers, and estuaries in a watershed, and into ground water supplies. Nonpoint sources also include atmospheric deposition and leaching from agricultural lands, urban areas, and unvegetated lands. The pollutants in runoff often include fertilizers, bacteria, metals, sediments, and petroleum compounds.
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Middle St. Johns - Florida Department of Environmental Protection

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