62-304.515. Kissimmee River Basin TMDLs

(1) Lake Holden. The nutrient TMDL for Lake Holden is 148 lb/year of TP and 10,526 lb/year of TN, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 74.0% reduction of TP based on the year 2000 landuse and a modeling period from 1996 through 2000; and

(c) The LA for nonpoint sources is a 74.0% reduction of TP based on the year 2000 landuse and a modeling period from 1996 through 2000.

(2) Lake Cypress. The nutrient TMDL for Lake Cypress is 1,374,801 lb/year of TN and 51,175 lb/year of TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 5.0% reduction of TN and 35.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006; and

(c) The LA for nonpoint sources is a 5.0% reduction of TN and 35.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006.

(3) Lake Marian. The nutrient TMDL for Lake Marian is 88,122 lb/year of TN and 6,013 lb/year of TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 55.0% reduction of TN and 53.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006; and

(c) The LA for nonpoint sources is a 55.0% reduction of TN and 53.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006.

(4) Lake Jackson. The nutrient and DO TMDL for Lake Jackson is 118,662 lb/year of TN and 5,553 lb/year of TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is 20.0% reduction of TN and 25.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006; and

(c) The LA for nonpoint sources is 20.0% reduction of TN and 25.0% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006.

(5) Lake Kissimmee. The nutrient TMDL for Lake Kissimmee is 2,795,484 lb/year of TN and 126,517 lb/year of TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 15.0% reduction of TN and 17% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006; and

(c) The LAs for nonpoint sources are 15% reduction of TN and 17% reduction of TP based on the year 2000 landuse and a modeling period from 2000 through 2006.

(6) Lake Persimmon. The nutrient TMDL for Lake Persimmon is a seven-year average of annual loads of 1,247 pounds per year (lb/year) TN and 58 lb/year TP, which is intended to achieve the applicable AGM chlorophyll a criterion for low color and high alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 42% reduction of TN (calculated from 2,153 lb/year) and a 51% reduction of TP (calculated from 119 lb/year), which are based on the highest seven-year average of annual loads from the 2005-2016 period; and

(c) The LA for nonpoint sources is a 42% reduction of TN (calculated from 2,153 lb/year) and a 51% reduction of TP (calculated from 119 lb/year), which are based on the highest seven-year average of annual loads from the 2005-2016 period.

(7) Reedy Lake. The nutrient TMDL for Reedy Lake is an AGM concentration of 0.95 mg/L TN and 0.03 mg/L TP, which are intended to achieve the applicable chlorophyll a criterion for low color and high alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 54% reduction of TN (calculated from 2.05 mg/L) and 0 % reduction of TP, which is based on the highest AGM concentrations from the 2000 – 2016 period; and

(c) The LA for nonpoint sources is 54% reduction of TN (calculated from 2.05 mg/L) and 0 % reduction of TP, which is based on the highest AGM concentration from the 2000 ‒ 2016 period.

(8) Lake Ida. The nutrient TMDL for Lake Ida is an AGM concentration of 0.95 mg/L TN and 0.03 mg/L TP, which are intended to achieve the applicable chlorophyll a criterion for low color and high alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 87% reduction of TN (calculated from 7.16 mg/L) and 0 % reduction of TP, which is based on the highest AGM concentrations from the 2000 – 2016 period; and

(c) The LA for nonpoint sources is 87% reduction of TN (calculated from 7.16 mg/L) and 0% reduction of TP, which is based on the highest AGM concentration from the 2000 ‒ 2016 period.

(9) Hickory Lake. The nutrient TMDL for Hickory Lake is an AGM concentration of 0.95 mg/L TN and 0.03 mg/L TP, which are intended to achieve the applicable chlorophyll a criterion for low color and high alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 69% reduction of TN (calculated from 3.07 mg/L) and 0% reduction of TP, which is based on the highest AGM concentrations from the 2000 – 2016 period; and

(c) The LA for nonpoint sources is 69% reduction of TN (calculated from 3.07 mg/L) and 0% reduction of TP, which is based on the highest AGM concentration from the 2000 ‒ 2016 period.

(10) Lake Clinch. The nutrient TMDL for Lake Clinch is an AGM concentration of 0.62 mg/L TN and 0.01 mg/L TP, which are intended to achieve the applicable chlorophyll a criterion for low color and low alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 18% reduction of TN (calculated from 0.76 mg/L) and 50% reduction of TP (calculated from 0.02 mg/L), which is based on the highest AGM concentrations from the 2000 – 2016 period; and

(c) The LA for nonpoint sources is 18% reduction of TN (calculated from 0.76 mg/L) and 50% reduction of TP (calculated from 0.02 mg/L), which is based on the highest AGM concentration from the 2000 ‒ 2016 period.

(11) Lake Adelaide. The nutrient TMDL for Lake Adelaide is an AGM concentration of 0.62 mg/L TN and 0.01 mg/L TP, which are intended to achieve the applicable chlorophyll a criterion for low color and low alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 6% reduction of TN (calculated from 0.66 mg/L) and 50% reduction of TP (calculated from 0.02 mg/L), which is based on the highest AGM concentrations from the 2000 – 2016 period; and

(c) The LA for nonpoint sources is 6% reduction of TN (calculated from 0.66 mg/L) and 50% reduction of TP (calculated from 0.02 mg/L), which is based on the highest AGM concentration from the 2000 - 2016 period.

(12) Lake Wales. The nutrient TMDLs for Lake Wales are an AGM concentration of 0.98 mg/L of TN and a concentration of 0.03 mg/L of TP, which are intended to achieve the applicable chlorophyll a criterion for low color and high alkalinity lakes, and are allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 40 % reduction in TN (calculated from 1.64 mg/L) and a 0 % reduction in TP (calculated from 0.03 mg/L), based on the highest AGM concentrations from the 2005 – 2016 period; and

(c) The LA for nonpoint sources is a 40% reduction in TN (calculated from 1.64 mg/L) and a 0% reduction in TP (calculated from 0.03 mg/L), based on the highest AGM concentrations from the 2005 – 2016 period.

(13) Lake Pierce. The nutrient TMDLs for Lake Pierce are seven-year averages of annual loads of 35,840 kg/year of TN and 1,398 kg/year of TP, which are intended to achieve an AGM chlorophyll a concentration of 20 µg/L, and are allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 88% reduction of TN (calculated from 300,627 kg/year) and a 76% reduction of TP (calculated from 35,840 kg/year), based on the highest seven-year average of annual loads from the 2007 – 2016 period; and

(c) The LA for nonpoint sources is an 88% reduction of TN (calculated from 300,627 kg/year) and a 76% reduction of TP (calculated from 35,840 kg per year), based on the highest seven-year average of annual loads from the 2007 – 2016 period.

(14) Lake Marion. The nutrient TMDLs for Lake Marion are seven-year averages of annual loads of 34,031 kg/year of TN and 1,252 kg/year of TP, which are intended to achieve the applicable chlorophyll a criterion for low color and high alkalinity lakes, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 84% reduction of TN (calculated from 207,949 kg/year) and a 74% reduction of TP (calculated from 4,766 kg/year), based on the highest seven-year average of annual loads from the 2007 – 2016 period; and

(c) The LA for nonpoint sources is a 84% reduction of TN (calculated from 207,949 kg/year) and a 74% reduction of TP (calculated from 4,766 kg/year), based on the highest seven-year average of annual loads from the 2007 – 2016 period.

(15) Lake Condel. The nutrient TMDL for Lake Condel is an AGM concentration of 1.05 mg/L TN and 0.03 mg/L TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 59% reduction of TN (calculated from 2.55 mg/L) and 86% reduction of TP (calculated from 0.21 mg/L), which are based on the highest AGM concentrations from the 2000 – 2015 period; and

(c) The LA for nonpoint sources is 59% reduction of TN (calculated from 2.55 mg/L) and 86% reduction of TP (calculated from 0.21 mg/L), which are based on the highest AGM concentration from the 2000 – 2015 period.

(16) Lake Anderson. The nutrient TMDL for Lake Anderson is an AGM concentration of 1.05 mg/L TN and 0.03 mg/L TP, and is allocated as follows:

(a) The WLA for wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 22% reduction of TN (calculated from 1.34 mg/L) and 52% reduction of TP (calculated from 0.06 mg/L), which are based on the highest AGM concentrations from the 2000 – 2015 period; and

(c) The LA for nonpoint sources is 22% reduction of TN (calculated from 1.34 mg/L) and 52% reduction of TP (calculated from 0.06 mg/L), which are based on the highest AGM concentration from the 2000 – 2015 period.

(17) Lake Istokpoga. The nutrient TMDL for Lake Istokpoga is a 7-year average load of 1,345,998 lbs/yr of TN, and 54,073 lbs/yr of TP, which are intended to achieve the applicable AGM chlorophyll a criterion for high color lakes, and is allocated as follows:

(a) The WLA for the Avon Park Correctional Institute WWTF (Permit Number FL0040029) is 4,569 lbs/yr of TN and 1,523 lbs/yr of TP;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 23 % reduction of TN (calculated from 1,740,817 lbs/yr) and a 56 % reduction of TP (calculated from 123,127 lbs/yr), based on the highest 7-year average load from the 2006 – 2017 period; and

(c) The LA for nonpoint sources is a 23 % reduction of TN (calculated from 1,740,817 lbs/yr) and a 56 % reduction of TP (calculated from 123,127 lbs/yr), based on the highest 7-year average load from the 2006 – 2017 period.

Rulemaking Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS. History–New 12-17-13, Amended 11-15-18, 1-30-20, 5-9-21, 11-9-21, 2-8-22, 7-7-22.