# 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 fromcomments 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.*

1Florida'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

2n 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.

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

4The 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

5Where 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. 7PP- Planning Period (January 1, 1996 through December 30, 2005);