Category Archives: Council At-Large District 4

2.7.7. Cedar River

2.7.7.1. About the Cedar River

Figure 2.36 The Cedar River Tributary (WBID 2262B and 2213P2) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.36 The Cedar River Tributary (WBID 2262B and 2213P2) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • At the I-10/I-295 Interchange
    • Primary Land Use: Residential/Forested
    • Current TMDL reports:
      Fecal Coliform (2262B, 2213P) and DO/Nutrients (2213P)
    • 2022 Verified Impairment for
      Fecal coliform ( coli) (2262B) and Iron (2213P2)
    • WBID Area: 22.8 sq. mi.

    Beneficial Use: Class III F/M
    (2262B Recreational – Freshwater, 2213P2 Recreational – Marine)

2.7.7.2. 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 Cedar River WBID 2262B (freshwater) and 2213P2 (marine) (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.12.

2.7.7.3. Discussion

Water quality data for the Cedar River are shown in Table 2.12. The Cedar River feeds into the Ortega River and thus is not directly a tributary of the St. Johns River. Even so, the Cedar River is tidal in nature, varying in height by ~1 ft over the course of a day (SJRWMD 2010d). Average total phosphorus levels had been lower than the reference value (DEP 2015c; DEP 2016d; DEP 2016i).  However, the average total phosphorus level 2020-2022 was near the reference value, with approximately half of samples exceeding the WQC, especially in the marine reach (2213P2). Average chlorophyll-a levels in the Cedar River were well above the WQC in the marine reach (2213P2) from 2020 through 2022. The marine reach (WBID 2213P2) had average copper and iron levels 2020-2022 near or exceeding the WQC.  The Cedar River was listed as Impaired for high levels of iron in 2016 and 2022 (DEP 2016h; DEP 2020e; DEP 2022).

In 2004, Cedar River was identified as being impaired for both fecal and total coliform, and as a result, a TMDL report was finalized in 2006 (Magley 2006b), with an 83% reduction of current anthropogenic fecal coliform loading. (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Currently, a Basin Management Action Plan (BMAP) to address this impairment is under development, but the timeframe for its release is currently unknown.  In 2020, Cedar River was verified as Impaired for fecal coliform based on the number of exceedances for the sample size (DEP 2020g).  FDEP confirmed anthropogenic sources for these bacteria using genetic marker analysis and chemical tracer data.  Average E. coli levels exceeded the WQC 2020-2022.

No recent measurements were available in WIN or STORET between 2020 and 2022 for the freshwater reach (WBID 2262B) for the following parameters: Arsenic, Cadmium, Copper, Iron, Lead, Nickel, Silver, Zinc.

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

Table 2.12 Water quality data for the Cedar River.

Water QualityAverage and Number of Samples º
ParameterCriteria (FW)202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW7.12
(0 of 9 samples)
7.50
(0 of 12 samples)
6.61 ± 0.48
(0 of 11 samples)
≥4.0 SW6.38
(2 of 15 samples)
6.20
(1 of 27 samples)
6.64 ± 0.47
(2 of 18 samples)
Total Nitrogen (mg/L)<1.54 FWNot availableNot available1.28 ± 0.10
(0 of 4 samples)
<1.54 SW1.00 ± 0.15
(0 of 3 samples)
Total Phosphorus (mg/L)<0.12 FW0.14
(9 of 14 samples)
0.11
(6 of 16 samples)
0.12 ± 0.01
(1 of 4 samples)
<0.12 SW0.16 ± 0.01
(3 of 3 samples)
Chlorophyll-a (µg/L)<20 FW7.35
(0 of 4 samples)
6.13
(0 of 4 samples)
9.50 ± 4.54
(0 of 3 samples)
<5.4 SW25.05
(9 of 10 samples)
32.72
(9 of 9 samples)
34.22 ± 18.05
(3 of 3 samples)
Arsenic (µg/L)≤503.01
(0 of 10 samples)
2.66
(0 of 8 samples)
1.96 ± 0.24
(0 of 8 samples)
Cadmium (µg/L)≤8.8 SW0.12
(0 of 10 samples)
0.08
(0 of 8 samples)
0.08 ± 0.04
(0 of 8 samples)
Copper (µg/L)≤3.7 SW4.07
(5 of 10 samples)
3.48
(3 of 8 samples)
3.62 ± 1.01
(2 of 8 samples)
Iron (mg/L)≤0.3 SW0.44
(8 of 10 samples)
0.45
(7 of 8 samples)
0.34 ± 0.04
(3 of 8 samples)
Lead (µg/L)≤8.5 SW2.97
(0 of 10 samples)
3.19
(0 of 8 samples)
1.96 ± 0.35
(0 of 8 samples)
Nickel (µg/L)≤8.3 SW1.80
(0 of 10 samples)
1.59
(0 of 8 samples)
1.53 ± 0.28
(0 of 8 samples)
Silver (µg/L)≤0.92 SW0.11
(0 of 10 samples)
0.07
(0 of 8 samples)
0.04 ± 0.03
(0 of 8 samples)
Zinc (µg/L)≤86 SW22.00
(0 of 10 samples)
23.50
(0 of 8 samples)
18.12 ± 2.75
(0 of 8 samples)
Fecal Indicator Bacteria (E. coli) (CFU/100 mL)E. coli <410 FW6900
(6 of 16 samples)
1630
(16 of 23 samples)
1848 ± 776
(7 of 12 samples)
E. coli <410 SW641 ± 397
(2 of 4 samples)
Enterococci <130 SW17 ± 12
(0 of 2 samples)
Turbidity (NTU)<29 FW6.58
(0 of 14 samples)
11.60
(0 of 12 samples)
12.43 ± 5.21
(0 of 4 samples)
<29 SW9.20 ± 3.39
(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.

2.7.17. 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.

2.7.22. Ortega River

2.7.22.1. About the Ortega River

Figure 2.51 The Ortega River Tributary (WBID 2213P1 and 2249A) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
Figure 2.51 The Ortega River Tributary (WBID 2213P1 and 2249A) with sanitary sewer overflows reported by JEA in 2022 (JEA 2022b).
    • West of NAS Jacksonville
    • Primary Land Use: Residential
    • Current TMDL reports:
      Fecal Coliform (2213P), DO/Nutrient (2213P)
    • 2022 Verified Impairment for Fecal coliform ( coli) (2249A)
    • WBID Area: 29.0 sq. mi.
    • Beneficial Use: Class III F/M

    (2213P1 Recreational – Marine, 2249A Recreational – Freshwater)

2.7.22.2. 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 Ortega River WBID 2213P1 (marine) and 2249A (freshwater) (DEP 2023b) shown above. The filtered dataset reflects water column concentrations and was used to generate Table 2.27.

2.7.22.3. Discussion

Water quality data for the Ortega River are shown in Table 2.27. Average total phosphorus and dissolved oxygen concentrations were within acceptable limits in the freshwater reach (2249A), but outside of WQC for the marine reach (2213P1). Average chlorophyll-a concentrations have remained lower than the WQC in the freshwater reach of the Ortega River, but chlorophyll-a concentrations in the marine reach exceeded or were near the WQC from 2020-2022. Very few samples were available to assess in 2022. All samples 2020-2022 had metals concentrations lower than the WQC.

Average fecal indicator bacteria measurements were below the WQC in 2020 and 2022, and exceeded it in 2021, while roughly one-quarter to one-third of the individual samples exceeded the WQC. The TMDL reports for fecal coliform (Rhew 2009f) and DO/Nutrients (Magley 2009b) published in 2009 referred to WBID 2213P, of which WBID 2213P1 is a subset as a result of changes to the WBID boundaries.  In 2022, the freshwater reach of the Ortega River was verified as Impaired for elevated levels of fecal coliform (E. coli) based on the number of exceedances for the sample size, and anthropogenic sources of E. coli have been identified (DEP 2020g; DEP 2022).

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

Table 2.27 Water quality data for the Ortega River.

Water QualityAverage and Number of Samples º
ParameterCriteria202020212022
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW6.59
(2 of 16 samples)
7.39
(1 of 15 samples)
5.48 ± 0.45
(2 of 17 samples)
≥4.0 SW6.7
(0 of 9 samples)
6.05
(0 of 5 samples)
3.11 ± 0.54
(2 of 2 samples)
Total Nitrogen (mg/L)<1.54 FW1.01
(0 of 4 samples)
Not available1.29 ± 0.31
(2 of 6 samples)
<1.54 SW0.97 ± 0.05
(0 of 2 samples)
Total Phosphorus (mg/L)<0.12 FW0.09
(2 of 13 samples)
0.06
(0 of 13 samples)
0.08 ± 0.01
(0 of 6 samples)
<0.12 SW0.14 ± 0.02
(1 of 2 samples)
Chlorophyll-a (µg/L)<20 FW0.86
(0 of 7 samples)
0.78
(0 of 7 samples)
1.33 ± 0.30
(0 of 6 samples)
<5.4 SW36.4
(5 of 5 samples)
28.00
(3 of 3 samples)
5.16 ± 3.24
(1 of 2 samples)
Arsenic (¬µg/L)≤50 FW1.51
(0 of 10 samples)
1.08
(0 of 3 samples)
2.75 ± 0.000
(0 of 3 samples)
≤50 SWNot availableNot available
Cadmium (¬µg/L)≤0.3 FW0.03
(0 of 6 samples)
0.03
(0 of 3 samples)
0.03 ± 0.000
(0 of 3 samples)
≤8.8 SW0.01
(0 of 4 samples)
Not availableNot available
Copper (¬µg/L)≤9.3 FW2.93
(0 of 6 samples)
2.75
(0 of 3 samples)
6.13 ± 1.85
(0 of 3 samples)
≤3.7 SW2.61
(0 of 4 samples)
Not availableNot available
Iron (mg/L)≤1.0 FWNot included in
2021 SORR
Not included in
2022 SORR
0.59 ± 0.15
(0 of 3 samples)
≤0.3 SWNot included in
2021 SORR
Not availableNot available
Lead (¬µg/L)≤3.2 FW0.32
(0 of 6 samples)
0.39
(0 of 3 samples)
0.50 ± 0.13
(0 of 3 samples)
≤8.5 SW1.65
(0 of 4 samples)
Not availableNot available
Nickel (¬µg/L)≤52 FW0.25
(0 of 6 samples)
0.25
(0 of 3 samples)
1.92 ± 0.83
(0 of 3 samples)
≤8.3 SW1
(0 of 4 samples)
Not availableNot available
Silver (¬µg/L)≤0.07 FW0.03
(0 of 6 samples)
0.03
(0 of 3 samples)
0.03 ± 0.000
(0 of 3 samples)
≤0.92 SW0.01
(0 of 4 samples)
Not availableNot available
Zinc (¬µg/L)≤120 FW15
(0 of 6 samples)
10.83
(0 of 3 samples)
27.5 ± 0.000
(0 of 3 samples)
≤86 SW7.5
(0 of 4 samples)
Not availableNot available
Fecal Indicator Bacteria (CFU/100 mL)E. coli <410 FW330
(3 of 14 samples)
620
(3 of 10 samples)
275 ± 67
(3 of 12 samples)
Enterococci <130 SWNot availableNot available
Turbidity (NTU)<29 FW5.19
(0 of 15 samples)
3.31
(0 of 7 samples)
3.62 ± 1.06
(0 of 6 samples)
<29 SWNot availableNot 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.

District Information

The links below will direct you to content that either is specific to the district you selected, or includes information on separate tributaries, so that you can view information on specific tributaries of interest to you.