62-304.505. Middle St. Johns River Basin TMDLs

(1) Lake Jesup. The TMDL for Lake Jesup is 247.3 tons/year of TN and 19.0 tons/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 50% reduction of current TN loading and a 34% reduction of TP loading; and

(c) The LA for nonpoint sources is 247.3 tons/year of TN and 19.0 tons/year of TP.

(2) Crane Strand Drain. The DO TMDL for Crane Strand Drain is 13.5 tons/year of TN and 31.3 tons/year of BOD, 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 29% reduction of current TN loading and a 57% reduction of current BOD loading; and

(c) The Load Allocation for nonpoint sources is 13.5 tons/year of TN and 31.3 tons/year of BOD.

(3) Crane Strand and Crane Strand Drain. The bacteriological TMDL for Crane Strand and Crain Strand Drain is are an annual median of 2.06 x 1011 colonies/day for fecal coliform 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 to address anthropogenic sources in the basin to result in a 49% reduction of in-stream fecal coliform loadings; and

(c) The LA for nonpoint sources is a 49% reduction of in-stream fecal coliform loadings.

(4) Long Branch. The bacteriological TMDL is an annual median of 4.64 x 1010 colonies/day for fecal coliform, 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 to address anthropogenic sources in the basin to result in a 32% reduction of in-stream fecal coliform loadings; and

(c) The LA for nonpoint sources is a 32% reduction of in-stream fecal coliform concentrations.

(5) Long Branch. The DO TMDL for Long Branch is 14.96 tons per year for BOD, 0.74 tons per year TP, and 5.20 tons per year TN, 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 10% reduction of current BOD loading in the tributaries to Long Branch, a 30% reduction of current TP loading in the tributaries to Long Branch, and a 17% reduction of current TN loading in the main channel of Long Branch; and

(c) The LA for nonpoint sources is a 10% reduction of current BOD loading in the tributaries to Long Branch, a 30% reduction of current TP loading in the tributaries to Long Branch, and a 17% reduction of current TN loading in the main channel of Long Branch.

(6) Gee Creek. The bacteriological TMDL for Gee Creek is 5.63 x 1010 counts/day for fecal coliform, 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 to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 79% reduction of sources contributing to exceedances of the criteria; and

(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 79% reduction of sources contributing to exceedances of the criteria.

(7) Lake Harney. The DO and nutrient TMDLs for Lake Harney are 1,522 tons/year of TN and 109 tons/year of TP, and are allocated as follows:

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

(b) The WLAs for discharges subject to the Department’s NPDES MS4 Permitting Program to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 39% reduction of TN and 33% reduction of TP at sources contributing to exceedances of the criteria; and

(c) The LAs for nonpoint sources to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 39% reduction of TN and 33% reduction of TP at sources contributing to exceedances of the criteria.

(8) Little Econlockhatchee River. The bacteriological TMDL for the Little Econlockhatchee River is 6.26 x 1011 counts/day for fecal coliform, and is allocated as follows:

(a) The WLA for the Iron Bridge Regional Water Reclamation Facility (FL0037966) is that it must meet its NPDES permit limits;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 57% reduction of sources contributing to exceedances of the criteria; and

(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 57% reduction of sources contributing to exceedances of the criteria.

(9) Smith Canal. The bacteriological TMDL for Smith Canal is 400 counts/100mL for fecal coliform, 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 to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 67% reduction of sources contributing to exceedances of the criteria; and

(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 67% reduction of sources contributing to exceedances of the criteria.

(10) Smith Canal. The DO TMDL for Smith Canal is 1.95 tons/year of TP, 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 to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria, based on the measured concentrations from the 1996 to 2003 period, will require a 26% reduction of TP at sources contributing to exceedances of the criteria; and

(c) The LA for nonpoint sources to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria, based on the measured concentrations from the 1996 to 2003 period, will require a 26% reduction of TP at sources contributing to exceedances of the criteria.

(11) Soldier Creek. The bacteriological TMDL for Soldier Creek is 2.87 x 1010 counts/day for fecal coliform, 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 to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria, based on the measured concentrations from the 2001 to 2008 period, will require a 37% reduction at sources contributing to exceedances of the criteria; and

(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2001 to 2008 period, will require a 37% reduction of sources contributing to exceedances of the criteria.

(12) St. Johns River above Lake Monroe. The DO and nutrient TMDLs for the St. Johns River above Lake Monroe are 1,892 tons/year of TN and 143 tons/year of TP, and are allocated as follows:

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

(b) The WLAs for discharges subject to the Department’s NPDES MS4 Permitting Program to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, are a 38% reduction of TN and 31% reduction of TP at sources contributing to exceedances of the criteria; and

(c) The LAs for nonpoint sources to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, are a 38% reduction of TN and 31% reduction of TP at sources contributing to exceedances of the criteria.

(13) St. Johns River above Wekiva River. The DO and nutrient TMDLs for the St. Johns River above Wekiva River are 1,906 tons/year of TN and 144 tons/year of TP, and are allocated as follows:

(a) The WLAs for the Sanford/North Wastewater Treatment Facility (FL0020141) are 9 tons/year of TN and 1 ton/year of TP;

(b) The WLAs for discharges subject to the Department’s NPDES MS4 Permitting Program to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 37% reduction of TN and 31% reduction of TP at sources contributing to exceedances of the criteria; and

(c) The LAs for nonpoint sources to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 37% reduction of TN and 31% reduction of TP at sources contributing to exceedances of the criteria.

(14) St. Johns River Downstream of Lake Harney and St. Johns River above Lake Jesup. The DO and nutrient TMDLs for the St. Johns River Downstream of Lake Harney and the St. Johns River above Lake Jesup are 1,697 tons/year of TN and 125 tons/year of TP, and are allocated as follows:

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

(b) The WLAs for discharges subject to the Department’s NPDES MS4 Permitting Program to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 37% reduction of TN and 32% reduction of TP at sources contributing to exceedances of the criteria; and

(c) The LAs for nonpoint sources to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criteria and nutrient targets, based on the measured concentrations from the 1996 to 2003 period, will require a 37% reduction of TN and 32% reduction of TP at sources contributing to exceedances of the criteria.

(15) Volusia Blue Spring and Volusia Blue Spring Run. The nutrient TMDL is a monthly arithmetic mean nitrate-nitrite concentration of 0.35 mg/L at the spring vent of Volusia Blue Spring and in-stream for Volusia Blue Spring Run, 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 to address anthropogenic sources in the basin such that in-stream nitrate-nitrite concentrations meet the TMDL target, which will require a 45% reduction of nitrate-nitrite based on the mean concentrations from the 2001-2013 period; and

(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream nitrate concentrations meet the TMDL target, which will require a 45% reduction of nitrate-nitrite based on the mean concentrations from the 2001-2013 period.

(16) DeLeon Spring. The nutrient TMDL for the DeLeon Spring is an annual arithmetic mean of 0.35 mg/L nitrate-nitrite at the spring vent, 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 56% reduction of nitrate-nitrite based on average concentrations from the 2009-2016 period; and

(c) The LA for nonpoint sources is a 56% reduction of nitrate-nitrite based on average loads from the 2009-2016 period.

(17) Gemini Springs. The nutrient TMDL for Gemini Springs is an annual arithmetic mean of 0.35 mg/L nitrate-nitrite at the spring vent, 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 74% reduction of nitrate-nitrite based on average concentrations from the 2009-2016 period; and

(c) The LA for nonpoint sources is a 74% reduction of nitrate-nitrite based on average loads from the 2009-2016 period.

(18) Lake George. The nutrient TMDL for Lake George is a seven-year average of annual loads of 4,132,773 kilograms per year (kg/year) TN and 219,324 kg/year TP, which are intended to achieve an AGM chlorophyll a concentration of 23 µg/L, 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 7% reduction of TN and a 29% reduction of TP from the 2003-2013 period; and

(c) The LA for nonpoint sources is a 7% reduction of TN and a 29% reduction of TP based on average loads from the 2003-2013 period.

(19) St. Johns River above Ocklawaha River. The nutrient TMDL for the St. Johns River above the Ocklawaha River is a seven-year average of annual loads of 4,132,773 kg/year TN and 219,324 kg/year TP, which are intended to achieve an AGM chlorophyll a concentration of 22 µg/L, 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 7% reduction of TN and a 29% reduction of TP from the 2003-2013 period; and

(c) The LA for nonpoint sources is a 7% reduction of TN and a 29% reduction of TP based on average loads from the 2003-2013 period.

(20) St. Johns River below Lake George. The nutrient TMDL for the St. Johns River below Lake George is a seven-year average of annual loads of 4,132,773 kg/year TN and 219,324 kg/year TP, which are intended to achieve an AGM chlorophyll a concentration of 23 µg/L, 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 7% reduction of TN and a 29% reduction of TP from the 2003-2013 period; and

(c) The LA for nonpoint sources is a 7% reduction of TN and a 29% reduction of TP based on average loads from the 2003-2013 period.

(21) Lake Adair. The nutrient TMDL for Lake Adair is a seven-year average of annual loads of 1,201 pounds per year (lbs/year) TN and 72 lbs/year TP, which are 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 45% reduction of TN and a 54% reduction of TP from the 2003-2013 period; and

(c) The LA for nonpoint sources is a 45% reduction of TN and a 54% reduction of TP based on average loads from the 2003-2013 period.

(22) Lake Alma. The nutrient TMDL for Lake Alma is a seven-year average of annual loads of 1,036 lbs/year TN and 91 lbs/year TP, which are intended to achieve an AGM chlorophyll a concentration of 30 µg/L, 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 43% reduction of TN and a 17% reduction of TP from the 2003-2014 period; and

(c) The LA for nonpoint sources is a 43% reduction of TN and a 17% reduction of TP based on average loads from the 2003-2014 period.

(23) Lake Searcy. The nutrient TMDL for Lake Searcy is a seven-year average of annual loads of 845 lbs/year TN and 96 lbs/year 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 wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 65% reduction of TN and a 38% reduction of TP from the 2003-2014 period; and

(c) The LA for nonpoint sources is a 65% reduction of TN and a 38% reduction of TP based on average loads from the 2003-2014 period.

(24) Bear Gully Lake. The nutrient TMDL for Bear Gully Lake is a seven-year average of annual loads of 23,166 lbs/year TN and 1,387 lbs/year 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 wastewater point sources is not applicable;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 20% reduction of TN and a 18% reduction of TP from the 2003-2014 period; and

(c) The LA for nonpoint sources is a 20% reduction of TN and a 18% reduction of TP based on average loads from the 2003-2014 period.

(25) Bethel Lake. The nutrient TMDL for Bethel Lake is a seven-year average of annual loads of 4,234 lbs/year TN and 234 lbs/year TP, which are intended to achieve the applicable chlorophyll a criterion for high color 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 45% reduction of TN (calculated from 7,762 lbs/year) and a 67 % reduction of TP (calculated from 715 lbs/year) from the 2002-2013 period; and

(c) The LA for nonpoint sources is a 45 % reduction of TN (calculated from 7,762 lbs/year) and a 67% reduction of TP (calculated from 715 lbs/year) based on average loads from the 2002-2013 period.

(26) Lake Gem. The nutrient TMDL for Lake Gem is a three-year average of annual loads of 1,130 lbs/year TN and 68 lbs/year 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 0% reduction of TN (calculated from 1,130 lbs/year) and a 62% reduction of TP (calculated from 176 lbs/year) from the 2007-2013 period; and

(c) The LA for nonpoint sources is a 0% reduction of TN (calculated from 1,130 lbs/year) and a 62% reduction of TP (calculated from 176 lbs/year) based on average loads from the 2007-2013 period.

(27) Louise Lake (Lower Segment). The nutrient TMDLs for Louise Lake (Lower Segment) are seven-year averages of annual loads of 6,034 lbs/year TN and 347 lbs/year TP, which are intended to achieve the applicable chlorophyll a criterion for low color low 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 38% reduction of TN (calculated from 9,732 lbs/year) and a 37% reduction of TP (calculated from 552 lbs/year), based on the highest seven-year average of annual loads from the 2010 – 2019 period; and,

(c) The LA for nonpoint sources is a 38% reduction of TN (calculated from 9,732 lbs/year) and a 37% reduction of TP (calculated from 552 lbs/year), based on the highest seven-year average of annual loads from the 2010 – 2019 period.

Rulemaking Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS. History–New 8-3-06, Amended 10-15-09, 7-17-14, 10-18-17, 3-26-18, 1-30-20, 5-9-21, 11-9-21.