Middle St. Johns - Florida Department of Environmental Protection

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144 Water Quality Assessment Report: Middle St. Johns Table 3.13 (continued) WBID 3004N Waterbody Segment Lake Fairview Lake 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 Lake IIIF Nutrients (TSI) Verified Impaired (Cat. 4a, 4b, 4c, or 5) for Listed Parameters 5 Not Impaired (Cat. 2) for Listed Parameters DO, Fecal Coliform Bacteria, Total Coliform Bacteria, Turbidity, Unionized Ammonia 3004O Asher Lake Lake IIIF DO Nutrients (TSI) 3004P Cub Lake Lake IIIF Nutrients (TSI) 3004Q Little Bear Lake 3011 Lake Lucien Outlet Lake IIIF Nutrients (TSI) Stream IIIF 3a 3011A Lake Weston Lake IIIF Nutrients (TSI) DO, Fecal Coliform Bacteria, Total Coliform Bacteria, Turbidity, Unionized Ammonia 3011B Lake Shadow Lake IIIF DO, Fecal Coliform Bacteria, Total Coliform Bacteria, Turbidity, Unionized Ammonia EPA’s 305(b)/ 303(d) Integrated Report Assessment Category for WBID 6 3c 3c 2 2 3c 2 3011C Lake Lucien Lake IIIF Mercury in Fish 5 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) 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;
Water Quality Assessment Report: Middle St. Johns 145 Table 3.13 (continued) 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 BOD = Biological oxygen demand DO = Dissolved oxygen TSI = Trophic State Index Listed below are the verified impaired segments in the planning unit, with the parameters for which they are impaired. Cowpen Pond Little Wekiva River Spring Lake Lake Florida Lake Orienta Lake Adalaide Starke Lake Lake Primavista Lake Lotta Prairie Lake Little Wekiva Canal Lake Lawne Silver Lake Bay Lake Lake Lucien Mercury in fish Fecal coliform bacteria, total coliform bacteria Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) DO, BOD, fecal coliform bacteria, nutrients (chlorophyll a) Nutrients (TSI) Nutrients (TSI) Nutrients (TSI) Mercury in fish Water quality ratings in the planning unit range from good to poor. An increase in flow rate due to urbanization is a major problem in the Little Wekiva River. The movement and deposition of sediments have also adversely affected water quality and the environment (SJRWMD, 2001c). The major parameters of concern for the planning unit are high levels of nutrients, and low DO levels. Additionally, the Little Wekiva watershed has impairment of coliform bacteria. Two springs in the planning unit are potentially impaired: Wekiva Spring and Rock Springs Run. The parameters of concern in Wekiva Spring are low DO and high levels of coliform bacteria, while in Rock Springs Run they are DO, coliform bacteria, and BOD. Thirteen lakes in the planning unit are verified impaired for at least 1 parameter assessed and 14 lakes are potentially impaired for at least 1 parameter assessed. The parameters of concern are mainly nutrients, DO, and coliform bacteria. In addition, the DOH has issued a health
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Middle St. Johns - Florida Department of Environmental Protection

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