Category Archives: Planning District 3

2.7.11. Durbin Creek

2.7.11.1. About Durbin Creek

Figure 2.40 The Durbin Creek Tributary (WBID 2365) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.40 The Durbin Creek Tributary (WBID 2365) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
  • East of the St. Johns River
  • South of I-295
  • Primary Land Use: Forested
  • Current TMDL reports:
    Fecal Coliform
  • Not included in 2022 Verified List of Impaired Waters
  • WBID Area: 26.2 sq. mi.

2.7.11.2. Data sources

Result were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Durbin Creek WBID 2365 (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.16.

2.7.11.3. Discussion

Water quality data for Durbin Creek are shown in Table 2.16. Historically, average dissolved oxygen levels in Durbin Creek were relatively low when compared to other tributaries of the LSJRB. However, no causative pollutant (specific environmental condition) has been identified, and thus no TMDL report is required as it is the “natural condition” of the water body (DEP 2009c). Average dissolved oxygen concentrations were above the WQC from 2020 to 2022, with a few individual samples below the WQC. A TMDL report is available for fecal coliform in Durbin Creek (Magley 2006a), with a 63% reduction of anthropogenic fecal coliform loading. Average fecal indicator bacteria levels in Durbin Creek were lower than the WQC in 2020-2022. (Note: the data analyses in the TMDL are based on different criteria than those used in this report).

Historical water quality data for Durbin Creek are available in previous versions of the River Report.

Table 2.16 Water quality data for Durbin Creek.

Water QualityAverage and Number of Samples º
ParameterCriteria (FW)202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)5.81
(2 of 10 samples)
6.15
(0 of 11 samples)
4.55 ± 0.54
(2 of 13 samples)
Total Nitrogen (mg/L)<1.54Not availableNot available0.91 ± 0.11
(0 of 3 samples)
Total Phosphorus (mg/L)<0.120.08
(1 of 5 samples)
0.08
(1 of 6 samples)
0.10 ± 0.02
(1 of 3 samples)
Chlorophyll-a (µg/L)<200.08
(0 of 5 samples)
1.00
(0 of 3 samples)
1.50 ± 0.50
(0 of 3 samples)
Arsenic (µg/L)≤500.75
(0 of 5 samples)
0.25
(0 of 3 samples)
2.75 ± 0.000
(0 of 3 samples)
Cadmium (µg/L)≤0.30.08
(0 of 5 samples)
0.03
(0 of 3 samples)
0.03 ± 0.000
(0 of 3 samples)
Copper (µg/L)≤9.37.25
(1 of 5 samples)
5.52
(1 of 3 samples)
6.64 ± 3.89
(1 of 3 samples)
Iron (mg/L)≤1Not included in
2021 SORR
Not included in
2022 SORR
0.39 ± 0.13
(0 of 3 samples)
Lead (µg/L)≤3.20.28
(0 of 5 samples)
0.49
(0 of 3 samples)
0.36 ± 0.09
(0 of 3 samples)
Nickel (µg/L)≤522.25
(0 of 5 samples)
1.08
(0 of 3 samples)
2.75 ± 0.000
(0 of 3 samples)
Silver (µg/L)≤0.070.03
(0 of 5 samples)
0.03
(0 of 3 samples)
0.03 ± 0.000
(0 of 3 samples)
Zinc (µg/L)≤12017.5
(0 of 5 samples)
19.17
(0 of 3 samples)
27.50 ± 0.000
(0 of 3 samples)
Fecal Indicator Bacteria (E. coli) (CFU/100 mL)<410120
(0 of 6 samples)
120
(0 of 8 samples)
134 ± 39
(0 of 8 samples)
Turbidity (NTU)<295.73
(0 of 5 samples)
12.49
(0 of 3 samples)
6.54 ± 2.71
(0 of 3 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

2.7.13. Goodbys Creek

2.7.13.1. About Goodbys Creek

Figure 2.42 The Goodbys Creek Tributary (WBID 2326A/B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.42 The Goodbys Creek Tributary (WBID 2326A/B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • East of the St. Johns River opposite NAS Jacksonville
    • Primary Land Use: Residential
    • Current TMDL reports:
      Fecal Coliform with BMAP
    • 2022 Verified Impairment for Iron (2326A/2326B)
    • WBID Area: 5.1 sq. mi.

    Beneficial Use: Class III F/M
    (2326A Recreational – Freshwater, 2326B Recreational – Marine)

2.7.13.2. Data sources

Data were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Goodbys Creek WBID 2326, 2326A (freshwater), and 2326B (marine) (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.18.

2.7.13.3. Discussion

Water quality data for Goodbys Creek are shown in Table 2.18. Previous average phosphorus levels in Goodbys Creek exceeded the updated WQC (EPA 2010b), but the average phosphorus levels between 2020 and 2021 were lower than the WQC (no nutrient data were available in 2022).  FDEP added the marine portion of Goodbys Creek (2326B) to its study list for dissolved oxygen in 2020 (DEP 2020f). Average dissolved oxygen levels in both the freshwater and marine portions of Goodbys Creek were above the respective WQC from 2020 to 2022, although more than 25% of individual samples were below the dissolved oxygen WQC in the marine reach (2326B).  Chlorophyll-a concentrations in the marine reach exceeded the WQC in every sample measured from 2020 to 2021, but no chlorophyll-a data were available in 2022. The freshwater reach of Goodbys Creek (2326A) was verified as Impaired for elevated iron concentrations based on the number of exceedances for the sample size, although no iron measurements were reported 2020-2022 (DEP 2020g). The marine reach (2326B) is also verified as impaired for iron (DEP 2022), and the marine reach has exceeded the iron WQC in all but one sample 2020-2022, with average levels triple the WQC in 2021-2022. FDEP has assigned a medium priority for the development of a TMDL to address iron levels in Goodbys Creek.

Average fecal indicator bacteria levels exceeded the reference value in 2020-2022 in both marine and freshwater reaches.  A TMDL report is available for fecal coliform in Goodbys Creek (Wainwright 2005b), with an 87% reduction of anthropogenic fecal coliform loading. (Note: the data analyses in the TMDL are based on different criteria than those used in this report). Subsequently, a BMAP for Goodbys Creek was legally adopted in 2009 (DEP 2009b).  In 2018, FDEP piloted microbial source tracking strategies in selected impaired waterbodies.  They found that the strategies used could be used to narrow down areas suspected of containing sources that actively contribute fecal indicating bacteria to water in order to identify and remediate them, but this work is resource-intensive.  Based on this work, WBID 2326A in Goodbys Creek was suspected to have sources of untreated human waste present, and WBID 2326B was known to have sources of untreated human waste present (DEP 2019a). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.3.  In 2020, the freshwater portion of Goodbys Creek was added to FDEP’s study list to monitor the response in fecal coliform (E. coli)  levels to ongoing restoration activities taking place as part of the existing BMAP (DEP 2020f).

No recent measurements were available in WIN between 2020 and 2022 for the freshwater reach (2326A) for the following parameters: Chlorophyll-a, Arsenic, Cadmium, Copper, Iron, Lead, Nickel, Silver, Zinc.

Historical water quality data for Goodbys Creek are available in previous versions of the River Report.

Table 2.18 Water quality data for Goodbys Creek.

Water QualityAverage and Number of Samples º
ParameterCriteria202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW5.39
(1 of 10 samples)
5.95
(1 of 10 samples)
5.02 ± 0.32
(0 of 11 samples)
≥4.0 SW5.45
(0 of 9 samples)
6.70
(1 of 14 samples)
5.29 ± 0.46
(6 of 19 samples)
Total Nitrogen (mg/L)<1.540.92
(0 of 4 samples)
0.82
(0 of 3 samples)
Not available
Total Phosphorus (mg/L)<0.120.11
(1 of 4 samples)
0.10
(1 of 10 samples)
Not available
Chlorophyll-a (µg/L)5.4 SW18.45
(4 of 4 samples)
24.03
(10 of 10 samples)
Not available
Arsenic (µg/L)≤50 SW2.35
(0 of 4 samples)
3.15
(0 of 5 samples)
2.78 ± 0.25
(0 of 12 samples)
Cadmium (µg/L)<8.8 SW0.01
(0 of 4 samples)
0.03
(0 of 5 samples)
0.02 ± 0.004
(0 of 12 samples)
Copper (µg/L)<3.7 SW1.81
(0 of 4 samples)
1.72
(0 of 5 samples)
1.46 ± 0.15
(0 of 12 samples)
Iron (mg/L)<0.3 SW0.58
(4 of 4 samples)
1.03
(5 of 5 samples)
1.00 ± 0.13
(11 of 12 samples)
Lead (µg/L)<8.5 SW0.71
(0 of 4 samples)
0.44
(0 of 5 samples)
0.41 ± 0.05
(0 of 12 samples)
Nickel (µg/L)<8.3 SW0.25
(0 of 4 samples)
0.45
(0 of 5 samples)
0.52 ± 0.12
(0 of 12 samples)
Silver (µg/L)<0.92 SW0.01
(0 of 4 samples)
0.01
(0 of 5 samples)
0.01 ± 0.002
(0 of 12 samples)
Zinc (µg/L)<86 SW5.00
(0 of 4 samples)
13.00
(0 of 5 samples)
6.25 ± 1.25
(0 of 12 samples)
Fecal Indicator Bacteria (E. coli) (CFU/100 mL)E. coli <410 FW770
(10 of 18 samples)
640
(12 of 17 samples)
1294 ± 188
(9 of 9 samples)
E. coli <410 SW304 ± 78
(1 of 4 samples)
Enterococci <130 SW521 ± 240
(9 of 9 samples)
Turbidity (NTU)<296.13
(0 of 4 samples)
6.36
(0 of 5 samples)
Not available
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

2.7.16. Intracoastal Waterway

2.7.16.1. About the Intracoastal Waterway

Figure 2.45 The Intracoastal Waterway Tributary (WBID 2205C) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.45 The Intracoastal Waterway Tributary (WBID 2205C) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • Near the mouth of the St. Johns River
    • Primary Land Use: Marsh/Wetland (Land Cover)
    • Current TMDL reports: None
    • 2022 Verified Impairment for Fecal coliform (Enterococci) and Iron
    • WBID Area: 23.9 sq. mi.
    • Beneficial Use: Class III M

    (Recreational – Marine)

2.7.16.2. Data sources

Data were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Intracoastal Waterway (ICW) WBID 2205C (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.21.

2.7.16.3. Discussion

Water quality data for the ICW are shown in Table 2.21. The ICW does not appear to provide a significant nutrient load to the St. Johns River. The Intracoastal Waterway was identified as being impaired for mercury, based on elevated levels of mercury in fish tissue, which is addressed by the statewide mercury TMDL (DEP 2013c). Limited fecal indicator bacteria measurements were available prior to 2019, but the average fecal indicator bacteria levels in 2020-2022 all exceeded the WQC; the ICW is verified impaired for fecal coliform in 2022 (DEP 2022). The ICW is also verified impaired for iron concentrations in 2022 (DEP 2022). Iron concentrations were at the WQC in 2022.

Historical water quality data for the Intracoastal Waterway are available in previous versions of the River Report.

Table 2.21 Water quality data for the Intracoastal Waterway.

Water QualityAverage and Number of Samples º
ParameterCriteria (SW)202020212022
Dissolved Oxygen (mg/L)≥4.05.97
(0 of 31 samples)
5.99
(3 of 14 samples)
7.03 ± 0.34
(0 of 12 samples)
Total Nitrogen (mg/L)<1.54Not availableNot available0.57 ± 0.08
(0 of 4 samples)
Total Phosphorus (mg/L)<5.40.09
(1 of 14 samples)
0.03
(0 of 8 samples)
0.08 ± 0.01
(0 of 4 samples)
Chlorophyll-a (µg/L)<112.62
(0 of 14 samples)
0.86
(0 of 7 samples)
3.18 ± 0.70
(0 of 4 samples)
Arsenic (µg/L)≤508.8
(0 of 13 samples)
20.00
(0 of 2 samples)
2.50 ± 0.01
(0 of 4 samples)
Cadmium (µg/L)≤8.80.36
(0 of 13 samples)
0.50
(0 of 2 samples)
0.20 ± 0.05
(0 of 4 samples)
Copper (µg/L)≤3.72.52
(5 of 13 samples)
5.50
(2 of 2 samples)
2.66 ± 0.09
(0 of 4 samples)
Iron (mg/L)≤0.30.4
(9 of 13 samples)
0.11
(0 of 2 samples)
0.30 ± 0.05
(3 of 4 samples)
Lead (µg/L)≤8.50.52
(0 of 13 samples)
0.50
(0 of 2 samples)
0.29 ± 0.04
(0 of 4 samples)
Nickel (µg/L)≤8.31.17
(1 of 13 samples)
1.00
(0 of 2 samples)
0.62 ± 0.13
(0 of 4 samples)
Silver (µg/L)≤0.92*1.77
(1 of 13 samples)
0.50
(0 of 2 samples)
0.19 ± 0.06
(0 of 4 samples)
Zinc (µg/L)≤860.35
(0 of 13 samples)
5.00
(0 of 2 samples)
3.75 ± 1.25
(0 of 4 samples)
Fecal Indicator Bacteria (Enterococci) (CFU/100 mL)E. coli <410630
(3 of 7 samples)
1610
(3 of 6 samples)
3330 ± 1978
(3 of 3 samples)
Enterococci <130315
(1 of 1 samples)
Turbidity (NTU)<296.22
(0 of 13 samples)
2.56
(0 of 1 sample)
7.45 ± 1.75
(0 of 4 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

2.7.17. Julington Creek

2.7.17.1. About Julington Creek

Figure 2.46 The Julington Creek Tributary (WBID 2351) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.46 The Julington Creek Tributary (WBID 2351) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • East of the St. Johns River at the
      I-95/I-295/9A intersection
    • Primary Land Use: Marsh/Wetland (Land Cover)
    • Current TMDL reports:
      Fecal Coliform
    • 2022 Verified Impairment for
      Fecal coliform ( coli)
    • WBID Area: 20.4 sq. mi.
    • Beneficial Use: Class III F

    (Recreational – Freshwater

2.7.17.2. Data sources

Data were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Julington Creek WBID 2351 (DEP 2023b) shown above.  The filtered dataset reflects water column concentrations and was used to generate Table 2.22.

2.7.17.3. Discussion

Water quality data for Julington Creek are shown in Table 2.22, but the data available in WIN and STORET for Julington Creek are extremely limited. Julington Creek was identified as being impaired for iron in 2016, but it was delisted in 2020 because the iron levels were found to be the result of naturally occurring conditions (DEP 2016h; DEP 2020e).

The fecal coliform levels in Julington Creek were historically higher than the WQC. Thus, a TMDL for fecal coliform was published in 2009 (Rhew 2009d), with 59% reduction of contributing sources. (Note: the data analyses in the TMDL are based on different criteria than those used in this report). Average fecal indicator bacteria levels in 2020-2022 remain higher than the WQC.  In 2022, Julington Creek was verified as Impaired for fecal coliform (E. coli) based on the number of exceedances based on the sample size, and anthropogenic sources of fecal coliform had been identified (DEP 2020g; DEP 2022).

No recent measurements were available in WIN between 2020 and 2022 for the following parameters: Arsenic, Cadmium, Copper, Lead, Iron, Nickel, Silver, Zinc, Turbidity.

Historical water quality data for Julington Creek are available in previous versions of the River Report.

Table 2.22 Water quality data for Julington Creek.

Water QualityAverage and Number of Samples º
ParameterCriteria (FW)202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)7.06
(0 of 11 samples)
7.59
(0 of 11 samples)
6.56 ± 0.31
(0 of 12 samples)
Total Nitrogen (mg/L)<1.540.97
(0 of 3 samples)
Not available0.92 ± 0.01
(0 of 2 samples)
Total Phosphorus (mg/L)<0.120.02
(0 of 3 samples)
Not available0.02 ± 0.001
(0 of 2 samples)
Chlorophyll-a (µg/L)<202.33
(0 of 3 samples)
30.67
(3 of 3 samples)
2.00 ± 0.000
(0 of 2 samples)
Fecal Coliform (CFU/100 mL)<4001920
(4 of 11 samples)
520
(4 of 8 samples)
910 ± 367
(7 of 11 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

2.7.21. Open Creek

2.7.21.1. About Open Creek

Figure 2.50 Open Creek (WBID 2299A/B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.50 Open Creek (WBID 2299A/B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • West of the Intracoastal Waterway,Southwest of Jacksonville Beach and Northwest of Ponte Vedra Beach
    • Primary Land Use: Residential
    • Current TMDL reports:
      Fecal Coliform with BMAP
    • Not included in 2022 Verified List of Impaired Waters
    • WBID Area: 6.5 sq. mi.
    • Beneficial Use: Class III M & F

    (2299A Recreational – Marine, 2299B Recreational – Freshwater)

2.7.21.2. Data sources

Data were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Open Creek WBID 2299A (marine) and 2299B (freshwater) (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.26.

2.7.21.3. Discussion

Water quality data for Open Creek are shown in Table 2.26. Limited water quality data were available in WIN for Open Creek in 2022. Open Creek has been identified as impaired for mercury (DEP 2016h) and is addressed in the statewide mercury TMDL already in place (DEP 2013c).  Open Creek was added to FDEP’s study list in 2020 for Biology in response to failing bioassessments of macroinvertebrates, but a causative pollutant has not been identified (DEP 2020f).

Average fecal indicator bacteria levels exceeded the WQC in 2020-2022. A TMDL report (Wainwright and Hallas 2009b) was released in 2009 to address fecal coliform, with a 60% reduction in contribution sources. (Note: the data analyses in the TMDL are based on different criteria than those used in this report). Subsequently, a BMAP to address this issue was legally adopted (DEP 2009b).  In 2018, FDEP piloted microbial source tracking strategies in selected impaired waterbodies.  They found that the strategies used could be used to narrow down areas suspected of containing sources that actively contribute fecal indicating bacteria to water in order to identify and remediate them, but this work is resource-intensive.  Open Creek was suspected of having sources of untreated human waste present, and ruminant waste was detected in the waterbody (DEP 2019a).  In 2020, both the freshwater and marine portions of Open Creek were added to FDEP’s study list to monitor the response in fecal coliform levels (E. coli in the freshwater portions and Enterococcus in the marine portions) to ongoing restoration activities taking place as part of the existing BMAP (DEP 2020f). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.3.

No recent measurements were available in WIN between 2020 and 2022 for the marine reach (2299A) for the following parameters: Chlorophyll-a, Arsenic, Cadmium, Copper, Iron, Lead, Nickel, Silver, Zinc.

Historical water quality data for these parameters in Open Creek are available in previous versions of the River Report. 

Table 2.26 Water quality data for Open Creek.

Water QualityAverage and Number of Samples º
ParameterCriteria202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW6.4
(0 of 11 samples)
6.46
(0 of 20 samples)
6.63 ± 0.17
(0 of 12 samples)
≥4.0 SW5.71
(0 of 4 samples)
5.74
(1 of 4 samples)
6.97 ± 0.17
(0 of 14 samples)
Total Nitrogen (mg/L)<1.540.86
(0 of 5 samples)
0.84
(0 of 3 samples)
Not available
Total Phosphorus (mg/L)<0.120.06
(0 of 5 samples)
0.08
(1 of 5 samples)
Not available
Chlorophyll-a (µg/L)<20 FW2.69
(0 of 4 samples)
5.63
(0 of 5 samples)
Not available
Arsenic (µg/L)≤50 FW0.98
(0 of 5 samples)
1.23
(0 of 10 samples)
Not available
Cadmium (µg/L)≤0.3 FW0.01
(0 of 5 samples)
0.02
(0 of 10 samples)
Not available
Copper (µg/L)≤9.3 FW5.19
(0 of 5 samples)
9.30
(2 of 10 samples)
Not available
Iron (µg/L)≤1.0 FW0.45
(0 of 5 samples)
0.47
(0 of 10 samples)
Not available
Lead (µg/L)≤3.2 FW0.1
(0 of 5 samples)
0.27
(0 of 10 samples)
Not available
Nickel (µg/L)≤52 FW0.45
(0 of 5 samples)
0.25
(0 of 10 samples)
Not available
Silver (µg/L)≤0.07 FW0.01
(0 of 5 samples)
0.01
(0 of 10 samples)
Not available
Zinc (µg/L)≤120 FW2.5
(0 of 5 samples)
3.50
(0 of 10 samples)
Not available
Fecal Indicator Bacteria(CFU/100 mL)E. coli <410 FW450
(8 of 15 samples)
1140
(18 of 22 samples)
961 ± 190
(7 of 9 samples)
E. coli <410 SW1776 ± 705
(2 of 2 samples)
Enterococci <130 SW531 ± 83
(3 of 3 samples)
Turbidity (NTU)<292.75
(0 of 4 samples)
3.68
(0 of 5 samples)
Not available
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

2.7.24. Pottsburg Creek

2.7.24.1. About Pottsburg Creek

Figure 2.53 The Pottsburg Creek Tributary (WBID 2265B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.53 The Pottsburg Creek Tributary (WBID 2265B) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • East of the St. Johns River at the
      Butler Blvd./I-95 interchange
    • Primary Land Use: Residential
    • Current TMDL reports:
      Fecal coliform with BMAP
    • 2022 Verified Impairment for Nutrients (Chlorophyll-a) (2265D) and Iron (2265D)
    • WBID Area: 9.1 sq. mi.
    • Beneficial Use: Class III F/M

    (2265C Recreational – Freshwater, 2265D Recreational – Marine)

2.7.24.2. Data sources

Data were historically downloaded from the FL STORET website (DEP 2010f), with recent data downloaded from WIN WAVES (DEP 2022f). Data were filtered based on the stations in the Pottsburg Creek WBID 2265C (freshwater),and 2265D (marine) (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.29.

2.7.24.3. Discussion

Water quality data for Pottsburg Creek are shown in Table 2.29. The marine reach of Pottsburg Creek (2265B) was verified as Impaired for nutrients in 2022 because of long-term chlorophyll-a concentrations exceeding the WQC (DEP 2020g; DEP 2022). Average phosphorus levels were near the WQC in 2020 (DEP 2015c; DEP 2016d; DEP 2016i) and the marine reach had concentrations of phosphorus and nitrogen near the WQC in 2022, with concentrations much higher (and fewer samples) than the freshwater reach (2265C). Average dissolved oxygen and chlorophyll-a were within limits in the freshwater reach, but average chlorophyll-a concentrations exceeded the WQC 2021-2022 in the marine reach.  The marine reach (2265C) was also verified impaired for iron concentrations in 2022 (DEP 2022); the single reported measurement in 2021 was below the WQC.

Average fecal coliform concentrations from 1999-2012 were well above the WQC, and fecal coliform levels in this residential tributary were identified as impaired in 2004. Consequently, a TMDL for fecal coliform was published (Rhew 2009d), with a 50% reduction in contributing sources. A BMAP for Pottsburg Creek (DEP 2010a) was legally adopted in August 2010. Pottsburg Creek remains impaired for fecal coliform, and the size of the exceedances has increased since implementation of the BMAP; the median exceedance increased from 800 CFU/100 mL in the TMDL report to 1,532 CFU/100 mL in the first phase of the BMAP (2010-2014) (DEP 2016b). Average fecal indicator bacteria levels exceeded the WQC 2020-2022. In 2018, FDEP piloted microbial source tracking strategies in selected impaired waterbodies.  They found that the strategies used could be used to narrow down areas suspected of containing sources that actively contribute fecal indicating bacteria to water in order to identify and remediate them, but this work is resource-intensive. Pottsburg Creek was suspected of sources of untreated human waste present (DEP 2019a). In 2020, the freshwater portion of Pottsburg Creek was added to FDEP’s study list to monitor the response in fecal coliform levels to ongoing restoration activities taking place as part of the existing BMAP (DEP 2020f). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.3.

No recent measurements were available in WIN between 2020 and 2022 for the freshwater reach (2265C) for the following parameters: Arsenic, Cadmium, Copper, Iron, Lead, Nickel, Silver, Zinc.

Historical water quality data for Pottsburg Creek are available in previous versions of the River Report.

Table 2.29 Water quality data for Pottsburg Creek.

 

Water QualityAverage and Number of Samples º
ParameterCriteria202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW6.25
(0 of 9 samples)
6.38
(0 of 11 samples)
6.08 ± 0.51
(1 of 12 samples)
≥4.0 SW6.91
(0 of 3 samples)
6.23
(2 of 7 samples)
6.52 ± 1.00
(0 of 4 samples)
Total Nitrogen (mg/L)<1.54 FW0.72
(0 of 7 samples)
1.18
(0 of 1 sample)
0.49 ± 0.01
(0 of 18 samples)
<1.54 SW1.48 ± 0.10
(0 of 3 samples)
Total Phosphorus (mg/L)<0.12 FW0.09
(1 of 7 samples)
0.05
(2 of 18 samples)
0.01 ± 0.001
(0 of 18 samples)
<0.12 SW0.11 ± 0.02
(1 of 2 samples)
Chlorophyll-a (µg/L)<20 FW2.33
(0 of 4 samples)
1.17
(0 of 12 samples)
2.42 ± 0.16
(0 of 18 samples)
<5.4 SW2.58
(0 of 3 samples)
5.95
(3 of 6 samples)
10.40 ± 5.33
(2 of 3 samples)
Arsenic (µg/L)≤50Not available1.69
(0 of 1 sample)
Not available
Cadmium (µg/L)≤0.3 FWNot availableNot availableNot available
Copper (µg/L)≤9.3 FWNot availableNot availableNot available
Iron (mg/L)≤1.0 FWNot availableNot availableNot available
Lead (µg/L)≤3.2 FWNot availableNot availableNot available
Nickel (µg/L)≤52 FWNot availableNot availableNot available
Silver (µg/L)≤0.07 FWNot availableNot availableNot available
Zinc (µg/L)≤120 FWNot availableNot availableNot available
Fecal Indicator Bacteria
(CFU/100 mL)
E. coli <410 FW610
(6 of 11 samples)
1170
(7 of 12 samples)
1239 ± 565
(4 of 4 samples)
E. coli <410 SW1122 ± 552
(2 of 3 samples)
Enterococci <130 SW199
(1 of 1 samples)
Turbidity (NTU)<29 FW3.45
(0 of 6 samples)
4.97
(0 of 6 samples)
Not available
< 29 SW5.30 ± 1.14
(0 of 3 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

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