St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 1 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1697

C-25 3160

C-25 Canal 

West (St. 

Johns Marsh)

Stream 3F Dissolved 

Oxygen

Dissolved 

Oxygen BOD

TN = 1.24 (n=24)

TP = 0.15 (n=28)

BOD = 2.4 (n=5)

≥ 5.0 mg/L 3c 5 5 Impaired Medium 12/27

Impaired by the IWR threshold and BOD 

was found to be the causative pollutant. 

BOD exceeded the threshold of 2.0 mg/L. 

TN/TP median = 7.04, standard deviation 

5.24, range 1.67 - 28.65, observations 24. 

Placed on the 1998 303(d) list based on 

listing for WBID 3189. TMDL proposed by 

EPA 9-30-06.

09-1698

C-25 3163

Fort Pierce 

Farm Canal 

(Belcher 

Canal/Taylor 

Creek)

Stream 3F Nutrients Nutrients 

(Chlorophyll-a)

TN = 0.85 (n=194)

TP = 0.20 (n=199)

BOD = 1.95 (n=4)

≤ 20 μg/L 2 5 5 Impaired Medium

2002 (16.58 μg/L)

2003 (23.34 μg/L)

2004 (30.55 μg/L)

2005 (18.00 μg/L)

2006 (6.95 μg/L)

2007 (11.57 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 20.0 μg/L in 

2002, 2005, 2006, and 2007. The annual 

average Chla value exceeded the IWR 

threshold in 2003 and 2004. TMDL 

proposed by EPA 9-30-06. Data indicate 

the WBID is TN limited. TP is at the listing 

threshold, is the causative pollutant for 

the DO impairment, and will be addressed 

in the DO TMDL.

09-1699

Coastal 3166 Moore's Creek Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1700

Coastal 3166 Moore's Creek Estuary 3M Nutrients 

(Chlorophyll-a)

TN = 0.76 (n=129)

TP = 0.15 (n=130) ≤ 11 μg/L 3b 5 5 Impaired Medium

2002 (2.87 μg/L)

2003 (4.32 μg/L)

2004 (13.91 μg/L)

2005 (13.16 μg/L)

2006 (5.12 μg/L)

2007 (4.68 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 11.0 μg/L in 

2002, 2003, 2006, and 2007. The annual 

average Chla value exceeded the IWR 

threshold in 2004 and 2005. Data indicate 

the WBID is TN limited. New listing from 

cycle 2.

09-1701

Coastal 3190 North Coastal Estuary 3M Dissolved 

Oxygen

Total 

Phosphorus

TN = 0.87 (n=203)

TP = 0.08 (n=207)

BOD = 1.5 (n=25)

≥ 4.0 mg/L 2 5 5 Impaired Medium 129/425

DO is verified impaired and TP was found 

to be the causative pollutant. TN, TP, and 

BOD did not exceed their respective 

thresholds however, regression analysis 

shows that TP, and TN to a lesser 

degree, are negatively impacting DO 

levels. TN/TP median = 10.88, standard 

deviation of 7.31, range 1.44 - 39.89, 

observations 185. Results based on 

station changes from comments received 

from SFWMD. Mini-run produced by 

Nancy Lewis, 5-6-09.
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 2 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1702

Coastal 3193A Roosevelt 

Bridge Beach 3M

Bacteria 

(Beach 

Advisories)

> 21 days of beach 

advisories 3c 5 5 Impaired High

2001 (0 days)

2002 (6 days)

2003 (0 days)

2004 (91 days)

2005 (223 days)

2006 (0 days)

2007 (0 days)

No Beach advisories in 2000, 2001, 2003, 

2006 or 2007. 6 advisory days in 2002, 91 

advisory days in 2004 and 223 in 2005.

09-1703

Coastal 3208 Manatee 

Pocket Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1704

Coastal 3208A ICWW (Martin 

County) Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1705

Coastal 3226 Jupiter Inlet Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1706

Coastal 3226 Jupiter Inlet Estuary 3M

Nutrients 

(Historic 

Chlorophyll-a)

< 3.0 μg/L N/A 5 5 Impaired Medium

2002 (4.92 μg/L)

2003 (4.75 μg/L)

2004 (7.00 μg/L)

Historic chlorophyll is one prong of the 

IWR nutrient assessment. Historically 

observed minimum value of 2.0 from 1993 

- 1997. The annual Chl-a average 

exceeded the minimum historic average 

by more than 50% in three consecutive 

years; 2002 (4.92 μg/L), 2002 (4.75 μg/L) 

and 2004 (7.00 μg/L). New listing from 

cycle 2

09-1707

Coastal 3226B Icww (Martin 

County) Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1708 Coastal 5003A South Indian 

River Estuary 2 Fecal Coliform ≤ 43 MPN/100 mL N/A 5 5 Impaired Low 83/451

09-1709

Coastal 5003A South Indian 

River Estuary 2 Fecal Coliform (3) ≤ 14 MPN/100 mL N/A 5 5 Impaired Low N/A

The third of 3 prongs that look at fecal 

coliform data. This prong refers to class 2 

waters and looks at median values.

09-1710

Coastal 8104

Atlantic 

Ocean (St. 

Lucie County; 

Fort Pierce 

Inlet)

Coastal 3M Fecal Coliform 

(2)

≤ 200 

counts/100mL 

monthly avg.

N/A 5 5 Impaired Low N/A

The second 3 prongs that look at fecal 

coliform data. This prong looks at the 

geometric mean on a monthly basis.
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 3 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1711

Loxahatchee 3224 Jonathan 

Dickinson Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1712

Loxahatchee 3224A

Loxahatchee 

River (North 

Fork)

Stream 3F Fecal Coliform ≤ 400 Counts / 100 

mL 2 5 5 Impaired Low 16/94

Results based on station changes from 

comments received from SFWMD. Minirun produced by Nancy Lewis, 5-6-09.

09-1713

Loxahatchee 3224B Kitchings 

Creek Stream 3F Nutrients Nutrients (Chlorophyll-a)

TN = 1.26 (n=69)

TP = 0.053 (n=69) ≤ 20 μg/L 3c 5 5 Impaired High

2001 (24.58 μg/L)

2002 (9.88 μg/L)

2003 (15.24 μg/L)

2004 (26.56 μg/L)

2007 (2.96 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 20.0 μg/L in 

2002, 2003, and 2007. The annual 

average Chla value exceeded the IWR 

threshold in 2001 and 2004. Data indicate 

the WBID is TN and TP limited.

09-1714

Loxahatchee 3224C Cypress 

Creek Stream 3F Nutrients (Chlorophyll-a)

TN = 1.24 (n=86)

TP = 0.062 (n=87) ≤ 20 μg/L 2 5 5 Impaired Medium

2001 (6.40 μg/L)

2002 (12.55 μg/L)

2003 (5.54 μg/L)

2004 (36.23 μg/L)

2007 (1.38 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 20.0 μg/L in 

2001, 2002, 2003, and 2007. The annual 

average Chla value exceeded the IWR 

threshold in 2004. Data indicate the WBID 

is TN and TP limited. New listing from 

cycle 2

09-1715

Loxahatchee 3226A

Loxahatchee 

River 

(Northwest 

Fork)

Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1716

Loxahatchee 3226A

Loxahatchee 

River 

(Northwest 

Fork)

Estuary 3M Nutrients

Nutrients 

(Historic 

Chlorophyll-a)

< 6.17 μg/L N/A 5 5 Impaired Medium

2001 (7.88 μg/L)

2002 (8.1 μg/L)

2003 (5.20 μg/L)

2004 (7.16 μg/L)

Historic chlorophyll is one prong of the 

IWR nutrient assessment. Historically 

observed minimum value of 4.11 from 

1996 - 2000. The annual Chl-a average 

exceeded the minimum historical average 

by more than 50% in 2001 and 2002.

09-1717

Loxahatchee 3226C

Loxahatchee 

River 

(Southwest 

Fork)

Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002 and 28 bull shark samples (average 

Hg = 1.85 mg/Kg) in 2003 - 2004.*

09-1718

Loxahatchee 3226C

Loxahatchee 

River 

(Southwest 

Fork)

Estuary 3M Nutrients Nutrients 

(Chlorophyll-a)

TN = 1.15 (n=100)

TP = 0.043 (n=100) ≤ 11 μg/L 2 5 5 Impaired Medium

2001 (8.29 μg/L)

2002 (21.50 μg/L)

2003 (15.31 μg/L)

2004 (19.18 μg/L)

2007 (11.1 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 11.0 μg/L in 

2001. The annual average Chla value 

exceeded the IWR threshold in 2002, 

2003, 2004, and 2007. Data indicate the 

WBID is TN and TP limited.
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 4 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1719

Loxahatchee 3226D Loxahatchee 

River Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1720

Loxahatchee 3226D Loxahatchee 

River Estuary 3M

Nutrients 

(Historic 

Chlorophyll-a)

< 6.27 μg/L N/A 5 5 Impaired Medium

2002 (6.86 μg/L)

2003 (7.77 μg/L)

2004 (9.83 μg/L)

2007 (3.94 μg/L)

Historic chlorophyll is one prong of the 

IWR nutrient assessment. Historically 

observed minimum value of 4.18 from 

1996 - 2000. The annual Chl-a average 

did not exceed the minimum historical 

average by more than 50% in two 

consecutive years.

09-1721

Loxahatchee 3228 Pal Mar Stream 3F

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

3a 5 5 Impaired High N/A

Listed based on 4 largemouth bass tissue 

samples (average Hg = 1.12 mg/Kg) in 

2002.*

09-1722

Loxahatchee 3230 Jupiter Farms Stream 3F

Nutrients 

(Historic 

Chlorophyll-a)

< 4.17 μg/L N/A 5 5 Impaired Medium

2002 (7.20 μg/L)

2003 (5.94 μg/L)

2004 (7.71 μg/L)

2005 (3.89 μg/L)

Historic chlorophyll is one prong of the 

IWR nutrient assessment. Historically 

observed minimum value of 2.78 from 

1996 - 2000. The annual Chl-a average 

exceeded the minimum historic average 

by more than 50% in three consecutive 

years; 2002, 2003, and 2004. New listing 

from cycle 2.

09-1723

Loxahatchee 3234 C-18 Stream 1

Mercury 

(Based on fish 

consumption 

advisory)

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

3c 5 5 Impaired High N/A

Listed based on 16 large mouth bass 

tissue samples (average Hg = 0.56 

mg/kg) from 2005.*

09-1724

Loxahatchee 3234 C-18 Stream 1

Nutrients 

(Historic 

Chlorophyll-a)

< 7.55 μg/L N/A 5 5 Impaired High

2002 (8.64 μg/L)

2003 (34.42 μg/L)

2004 (3.05 μg/L)

2005 (9.07 μg/L)

2006 (4.84 μg/L)

2007 (18.7 μg/L)

Historic chlorophyll is one prong of the 

IWR nutrient assessment. Historically 

observed minimum value of 5.03 from 

1996 - 2000. The annual Chl-a average 

exceeded the minimum historic average 

by more than 50% in two consecutive 

years; 2002 and 2003. New listing from 

cycle 2.

09-1725

North St. 

Lucie 3194

St. Lucie 

River (North 

Fork)

Estuary 3M Coliforms Fecal Coliform ≤ 400 Counts / 100 

mL 3c 5 5 Impaired Low 10/55

09-1726

North St. 

Lucie 3194

St. Lucie 

River (North 

Fork)

Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

3c 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 5 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1727

North St. 

Lucie 3194A Ten Mile Creek Stream 3F

Biochemical 

Oxygen 

Demand

Dissolved 

Oxygen

Total 

Phosphorus

TN = 1.02 (n=495)

TP = 0.30 (n=504)

BOD = 1.75 (n=22)

≥ 5.0 mg/L 3c 5 5 Impaired High 114/168 Listed based on 1998 303(d) list and 

assessed as DO.

09-1728

North St. 

Lucie 3194A Ten Mile Creek Stream 3F Dissolved Oxygen

Dissolved 

Oxygen

Total 

Phosphorus

TN = 1.02 (n=495)

TP = 0.30 (n=504)

BOD = 1.75 (n=22)

≥ 5.0 mg/L 3c 5 5 Impaired High 114/168

Impaired by the IWR threshold and 

nutrients were found to be the causative 

pollutant. TP exceeded the threshold of 

0.22 mg/L. TN/TP median = 3.67, 

standard deviation of 1.97, range 1.45 - 

28, observations 494.

09-1729

North St. 

Lucie 3194A Ten Mile Creek Stream 3F Coliforms Fecal Coliform ≤ 400 Counts / 100 mL 3c 5 5 Impaired Low 9/45

09-1730

North St. 

Lucie 3194A Ten Mile Creek Stream 3F Nutrients Nutrients (Chlorophyll-a)

TN = 1.02 (n=495)

TP = 0.30 (n=504)

BOD = 1.75 (n=22)

≤ 20 μg/L 2 5 5 Impaired High

2002 (7.82 μg/L)

2006 (10.26 μg/L)

2007 (9.58 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 20.0 μg/L in 

2002, 2006, and 2007. TP exceeded the 

listing threshold, is the causative pollutant 

for DO, and will be addressed in the DO 

TMDL. Data indicate the WBID is TN 

limited. Delisted from the 1998 303(d) list 

in cycle 1 .

09-1731

North St. 

Lucie 3194B

St. Lucie 

River (North 

Fork)

Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1732

North St. 

Lucie 3194C Savannas Lake 3F Copper Cu ≤ e(0.8545[lnH]-1.702) μg/L 3b 5 5 Impaired Medium 21/70

Potential sources may include 

agrochemicals, fungicides, algaecides, 

soil erosion, vehicle brake pads, roof 

runoff, etc based on the report "Land Use 

Changes and Water Quality Impacts: 

Copper Contamination in St. Lucie 

Estuary, Florida."

09-1733

North St. 

Lucie 3194C Savannas Lake 3F Dissolved Oxygen BOD

TN = 0.93 (n=158)

TP = 0.027 (n=159)

BOD = 4.6 (n=5)

≥ 5.0 mg/L 3c 5 5 Impaired Medium 69/187

Impaired by the IWR threshold and BOD 

was found to be the causative pollutant. 

BOD exceeded the threshold of 2.9 mg/L. 

TN/TP median = 32.59, standard 

deviation 40.87, range 2.70 - 360, 

observations 156. New listing from cycle 

2.

09-1734

South St. 

Lucie - IRL 3210

St. Lucie 

River (South 

Fork)

Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 6 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

09-1735

South St. 

Lucie - IRL 3210

St. Lucie 

River (South 

Fork)

Estuary 3M Turbidity < 29 NTU + 

background 2 5 5 Impaired Medium 77/545

Background turbidity was set at the 20th 

percentile of the data for the verified 

period, which was 4.35 NTU. The 

threshold value, defined as 29 NTU above 

background, was 33.35 NTU. New cycle 

listing from 2

09-1736

South St. 

Lucie - IRL 3210B

St. Lucie 

River (South 

Fork)

Stream 3F Dissolved 

Oxygen

Dissolved 

Oxygen

TN = 1.01 (n=268)

TP = 0.14 (n=269)

BOD = 1.7 (n=22)

≥ 5.0 mg/L 5 5 5 Impaired High 316/525

Impaired by the IWR theshold and 

nutrients were found to be the causative 

pollutant. There is a strong correlation 

between chlorophyll and DO which 

indicates that chlorophyll has a strong 

influence on DO levels. TN/TP median = 

7.79, standard deviation of 7.26, range 

1.15 - 87.67, observations 264.

09-1737

South St. 

Lucie - IRL 3210B

St. Lucie 

River (South 

Fork)

Stream 3F Nutrients Nutrients 

(Chlorophyll-a)

TN = 1.01 (n=268)

TP = 0.14 (n=269)

BOD = 1.7 (n=22)

≤ 20 μg/L 2 5 5 Impaired High

2001 (12.52 μg/L)

2002 (8.52 μg/L)

2003 (9.75 μg/L)

2004 (17.61 μg/L)

2005 (11.73 μg/L)

2006 (12.6 μg/L)

2007 (6.24 μg/L)

The annual average Chla value did not 

exceed the IWR threshold of 20.0 μg/L in 

2001, 2002, 2003, 2004, 2005, 2006, and 

2007. Data indicate the WBID is nitrogen 

limited. High chlorophyll values have a 

strong correlation to low DO and is thus 

being listed as impaired based on an 

imbalance of flora/fauna.

09-1738

South St. 

Lucie - IRL 3210A St. Lucie Canal Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

09-1739

South St. 

Lucie - IRL 3211 Bessey Creek Estuary 3M

Mercury 

(Based on fish 

consumption 

advisory)

Exceeds DoH 

threshold (> 0.3 

mg/kg)

N/A 5 5 Impaired High N/A

Listed based on 87 king mackerel tissue 

samples (average Hg = 0.67 mg/Kg) in 

2002.*

1

 Florida's waterbody classifications are defined as: 

 1 - Potable water supplies 

 2 - Shellfish propagation or harvesting

 3F - Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife in fresh water

 3M - Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife in marine water

 4 - Agricultural water supplies

 5 - Navigation, utility, and industrial use

2

 n is equal to the number of samples. When samples are collected at the same location less than 4 days apart, the median of those results represents a single sample for the purpose of determining n. 

3 The Cycle 1 assessment was done in 2003 and included data from that Verified Period (January 1, 1996 through June 30, 2003).

4 The Cycle 2 assessment is the current assessment and includes data from the Verified Period (January 1, 2001 through June 30, 2008).

 † EPA's Integrated Report Category:
St. Lucie - Loxahatchee Group 2 Basin / Southeast District - Verified List

Hydrologic Unit: St. Lucie - Loxahatchee

May 15, 2009 7 of 7 Florida Department of Environmental Protection

OGC Case 

Number

Planning 

Unit WBID

Water 

Segment 

Name

Waterbody 

Type

Waterbody 

Class1

1998 303(d) 

Parameter 

Of Concern

Parameters 

Assessed 

Using the 

Impaired 

Surface 

Waters Rule 

(IWR)

Dissolved 

Oxygen / 

Biology 

Pollutant of 

Concern

DO / Nutrient / 

Biology - TN, TP, 

BOD Median 

Values (mg/L)2

Concentration 

of Criterion or 

Threshold Not 

Met

Previous 

EPA 

Integrated 

Report 

Category †

 -

Cycle 1 

Assessment3

 Current EPA 

Integrated 

Report 

Category † - 

Cycle 2 

Assessment4

Current 

Integrated 

Category†

 - 

Final 

Assessment

Current 

Assessment 

Status

Priority for 

TMDL 

Development5

Verified Period

(# of Exceedances/ 

# of Samples)6

Comments 

 5 - Water quality standards are not attained and a TMDL is required.

 N/A - Not Applicable

5 Where a parameter was identified as impaired, a priority of “medium” was assigned. Exceptions are waters where the impairment poses a threat to potable water or 

 human health, which have been assigned a “high” priority, and fecal coliform impairments, which have been assigned a “low” priority. All other listings as of this cycle are prioritized based

 on the following: it is our intent that listings with a "High" priority be addressed within the next 5 years, listings with a "Medium" priority be addressed within 5-10 years as resources allow,

 and listings with a "Low" priority be addressed within the next 10 years.

6 VP - Verified Period (January 1, 2001 through June 30, 2008)

* A statewide TMDL for mercury, that will address this waterbody, is scheduled to be completed in 2012.

^ Beach advisories are based on FL Dept of Health Enterococcus (>103 CFU/100mL) or fecal coliform (>399 CFU/100mL) criteria.

Beach advisory data is based on "2006 Beach Advisories" file created 04/16/2007 by Barbara Donner of FDEP.

Fish advisory data is based on "2007 Fish Advisories" file created 07/11/2006 and updated 11/05/2007 by Barbara Donner of FDEP.

The Group 2 St. Lucie - Loxahatchee Verified list is based on IWR Run 35.

7 PP - Planning Period (January 1, 1996 through December 30, 2005);