Category Archives: Planning District 3

District Information

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2.7.11. Durbin Creek

2.7.11.1. About Durbin Creek

Figure 2.42
Figure 2.43 The Durbin Creek Tributary (WBID 2365).
  • East of the St. Johns River South of I-295
  • Primary Land Use: Forested
  • Current TMDL reports: Fecal Coliform, Mercury
  • Verified Impaired 2016 (final): None
  • WBID Area: 26.2 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.11.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in the Durbin Creek WBID 2365 (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.13.

2.7.11.3. Discussion

Water quality data for Durbin Creek are shown in Table 2.13. 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). A TMDL report is available for fecal coliform in Durbin Creek (Magley 2006a). (Note: the data analyses in the TMDL are based on different criteria than that used in this report).

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

Table 2.13 Water quality data for Durbin Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria (FW)201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)3.67
(2 of 7 samples)
5.93
(0 of 3 samples)
5.57
(0 of 6 samples)
Total Nitrogen (mg/L)<1.540.97
(0 of 5 samples)
Not availableNot available
Total Phosphorus (mg/L)<0.120.09
(1 of 9 samples)
0.06
(0 of 6 samples)
0.11
(1 of 6 samples)
Chlorophyll-a (µg/L)<200.73
(0 of 6 samples)
0.61
(0 of 3 samples)
1.50
(0 of 3 samples)
Arsenic (µg/L)≤500.41
(0 of 5 samples)
0.41
(0 of 3 samples)
1.92
(0 of 3 samples)
Cadmium (µg/L)≤0.30.03
(0 of 5 samples)
0.03
(0 of 3 samples)
0.03
(0 of 3 samples)
Copper (µg/L)≤9.30.49
(0 of 5 samples)
0.27
(0 of 3 samples)
2.75
(0 of 3 samples)
Lead (µg/L)≤3.20.46
(0 of 5 samples)
0.26
(0 of 3 samples)
0.93
(0 of 3 samples)
Nickel (µg/L)≤520.50
(0 of 5 samples)
1.06
(0 of 3 samples)
2.75
(0 of 3 samples)
Silver (µg/L)≤0.070.00
(0 of 5 samples)
0.00
(0 of 3 samples)
0.03
(0 of 3 samples)
Zinc (µg/L)≤1206.74
(0 of 5 samples)
3.82
(0 of 3 samples)
19.17
(0 of 3 samples)
Fecal Coliform (CFU/100 mL)<400Not availableNot available72
(0 of 3 samples)
Turbidity (NTU)<296.83
(0 of 6 samples)
4.98
(0 of 3 samples)
34.91
(1 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 2.44
Figure 2.45 The Goodbys Creek Tributary (WBID 2326).
  • East of the St. Johns River opposite NAS Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009), Mercury
  • Verified Impaired 2016 (final): None
  • WBID Area: 5.1 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.13.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in Goodbys Creek WBID 2326, 2326A (freshwater), and 2326B (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.14.

2.7.13.3. Discussion

Water quality data for Goodbys Creek are shown in Table 2.14. Previous average phosphorus levels in Goodbys Creek exceeded the recently updated WQC (EPA 2010b), but recent data suggest that the average phosphorus levels have held roughly steady near the WQC.  Average dissolved oxygen in the freshwater portion of Goodbys Creek (2326A) is above the WQC, and measurements in the saltwater portion (2326B) indicate improving dissolved oxygen levels over the past three years.  Similarly, chlorophyll-a concentrations in the freshwater portion of Goodbys Creek were within acceptable limits, but average chlorophyll-a concentrations in the marine portion exceeded the WQC.  There are limited data in WIN or STORET regarding water quality in general in the marine portion of Goodbys Creek.

The fecal coliform level, averaged over all the stations in Goodbys Creek, is below the critical level of 2.6, which is the logarithm of the state maximum of 400 colony-forming-units per 100 mL. A TMDL report is available for fecal coliform in Goodbys Creek (Wainwright 2005b). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Goodbys Creek was legally adopted in 2009 (DEP 2009b).  The last Annual Progress Report for this BMAP was published in 2016 and listed 18 active, ongoing projects underway by FDOT and JEA to address the BMAP in the Goodbys Creek watershed (DEP 2017c). FDEP reported improvement in the frequency of fecal coliform exceedances in the marine segment of Goodbys Creek, and recent fecal coliform measurements had agreed with this assessment. Average fecal coliform concentrations appear to be trending downward and were around the WQC in 2017 but rose again in 2018. Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2.

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

Table 2.14 Water quality data for Goodbys Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW5.02
(3 of 12 samples)
5.14
(0 of 9 samples)
5.91
(0 of 12 samples)
≥4.0 SW2.40
(1 of 1 samples)
4.06
(2 of 4 samples)
6.66
(0 of 12 samples)
Total Nitrogen (mg/L)<1.54Not available0.74
(0 of 9 samples)
0.73
(0 of 20 samples)
Total Phosphorus (mg/L)<0.12Not available0.13
(0 of 6 samples)
0.09
(7 of 20 samples)
Chlorophyll-a (µg/L)<20 FWNot available1.70
(0 of 2 samples)
2.41
(0 of 12 samples)
<5.4 SWNot available12.43
(3 of 4 samples)
24.19
(8 of 8 samples)
Arsenic (µg/L)≤50 FWNot available4.18
(0 of 2 samples)
3.07
(0 of 12 samples)
Cadmium (µg/L)≤0.3 FWNot available0.01
(0 of 2 samples)
0.01
(0 of 12 samples)
Copper (µg/L)≤9.3 FWNot available0.40
(0 of 2 samples)
0.81
(0 of 12 samples)
Lead (µg/L)≤3.2 FWNot available0.10
(0 of 2 samples)
0.15
(0 of 12 samples)
Nickel (µg/L)≤52 FWNot available0.35
(0 of 2 samples)
0.53
(0 of 12 samples)
Silver (µg/L)≤0.07 FWNot available0.01
(0 of 2 samples)
0.01
(0 of 12 samples)
Zinc (µg/L)≤120 FWNot available2.50
(0 of 2 samples)
2.50
(0 of 12 samples)
Fecal Coliform (CFU/100 mL)<400530
(7 of 13 samples)
380
(2 of 6 samples)
1900
(14 of 23 samples)
Turbidity (NTU)<29Not available5.97
(0 of 6 samples)
7.90
(7 of 20 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.

2.7.16. Intracoastal Waterway

2.7.16.1. About the Intracoastal Waterway

Figure 2.48
Figure 2.49 The Intracoastal Waterway Tributary (WBID 2205C).
  • Near the mouth of the St. Johns River
  • Primary Land Use: Marsh/Wetland (Land Cover)
  • Current TMDL reports: Mercury
  • Verified Impaired 2016 (final): Fecal Coliform (low), Iron (med)
  • WBID Area: 23.9 sq. mi.
  • Beneficial Use: Class III M (Recreational – Marine)

2.7.16.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in the Intracoastal Waterway (ICW) WBID 2205C (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.17.

2.7.16.3. Discussion

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in the Intracoastal Waterway (ICW) WBID 2205C (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.17.

Table 2.17 Water quality data for the Intracoastal Waterway.

 Water QualityAverage and Number of Samples º
ParameterCriteria (SW)201620172018
Dissolved Oxygen (mg/L)≥4.06.36
(0 of 6 samples)
5.66
(1 of 14 samples)
6.20
(0 of 24 samples)
Total Nitrogen (mg/L)<1.540.50
(0 of 3 samples)
Not availableNot available
Total Phosphorus (mg/L)<5.42.59
(0 of 3 samples)
4.20
(2 of 9 samples)
0.10
(1 of 22 samples)
Chlorophyll-a (µg/L)<112.59
(0 of 3 samples)
4.20
(0 of 9 samples)
4.57
(5 of 11 samples)
Arsenic (µg/L)≤5018.19
(0 of 6 samples)
10.99
(0 of 10 samples)
6.36
(0 of 22 samples)
Cadmium (µg/L)≤8.80.09
(0 of 6 samples)
0.18
(0 of 10 samples)
0.50
(0 of 22 samples)
Copper (µg/L)≤3.71.19
(0 of 6 samples)
1.36
(0 of 10 samples)
4.36
(17 of 22 samples)
Lead (µg/L)≤8.50.14
(0 of 6 samples)
0.11
(0 of 10 samples)
0.50
(0 of 22 samples)
Nickel (µg/L)≤8.30.54
(0 of 6 samples)
0.58
(0 of 10 samples)
1.00
(0 of 22 samples)
Silver (µg/L)≤0.92*0.03
(0 of 6 samples)
0.01
(0 of 10 samples)
0.50
(0 of 22 samples)
Zinc (µg/L)≤862.70
(0 of 6 samples)
3.02
(0 of 10 samples)
5.00
(0 of 22 samples)
Fecal Coliform (CFU/100 mL)<400Not availableNot available1100
(1 of 1 sample)
Turbidity (NTU)<293.96
(0 of 3 samples)
6.98
(0 of 9 samples)
6.13
(0 of 10 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 2.49
Figure 2.50 The Julington Creek Tributary (WBID 2351).
  • 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, Mercury
  • Verified Impaired 2016 (final): Iron (med)
  • WBID Area: 20.4 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.17.2. Data sources

Result data was downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in Julington Creek WBID 2351 (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.18.

2.7.17.3. Discussion

Water quality data for Julington Creek are shown in Table 2.18, but the data available in WIN and STORET for Julington Creek are extremely limited, with no measurements reported for 2017. Julington Creek was identified as being impaired for iron (DEP 2016j).

The fecal coliform level, averaged over all the stations in Julington Creek, were historically higher than the WQC of 400 colony-forming-units (CFU) per 100 mL. Thus, a TMDL for fecal coliform was published in 2009 (Rhew 2009d). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Limited measurements from 2016 and 2018 indicate fecal coliform levels that are near or slightly higher than the WQC.

No recent measurements were available in WIN or STORET between 2016 and 2018 for the following parameters:

  • Total nitrogen

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

Table 2.18 Water quality data for Julington Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria (FW)201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)7.54
(0 of 4 samples)
Not available6.97
(0 of 13 samples)
Total Phosphorus (mg/L)<0.12Not availableNot available0.05
(0 of 1 sample)
Chlorophyll-a (µg/L)<20Not availableNot available2.90
(0 of 1 sample)
Arsenic (µg/L)≤50Not availableNot available1.32
(0 of 1 sample)
Cadmium (µg/L)≤0.3Not availableNot available0.01
(0 of 1 sample)
Copper (µg/L)≤9.3Not availableNot available2.49
(0 of 1 sample)
Lead (µg/L)≤3.2Not availableNot available0.13
(0 of 1 sample)
Nickel (µg/L)≤52Not availableNot available0.50
(0 of 1 sample)
Silver (µg/L)≤0.07Not availableNot available0.01
(0 of 1 sample)
Zinc (µg/L)≤120Not availableNot available2.50
(0 of 1 sample)
Fecal Coliform (CFU/100 mL)<400400
(2 of 4 samples)
Not available590
(7 of 12 samples)
Turbidity (NTU)<29Not availableNot available4.00
(0 of 1 sample)
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 2.54
Figure 2.55 Open Creek (WBID 2299A/B).
  • West of the Intracoastal Waterway
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009), Mercury
  • Verified Impaired 2016 (final): None
  • WBID Area: 6.5 sq. mi.
  • Beneficial Use: Class III M & F (Marine – 2299A, Freshwater – 299B)

2.7.21.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in Open Creek WBID 2299A (marine) and 2299B (freshwater) (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.22.

2.7.21.3. Discussion

Water quality data for Open Creek are shown in Table 2.22, but the number of measurements reported in STORET is very limited. Total phosphorus, dissolved oxygen, and turbidity were in the normal range in 2017. Open Creek has been identified as impaired for mercury (DEP 2016j) and is addressed in the statewide mercury TMDL already in place (DEP 2013c).

Fecal coliform levels, averaged over all the stations in Open Creek, remain around the WQC. However, there is some variation in the levels dependent on the location. A TMDL report (Wainwright and Hallas 2009b) was released in 2009 to address fecal coliform. (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP to address this issue was legally adopted (DEP 2009b). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2.  The last Annual Progress Report for this BMAP was published in 2016 and listed 18 active, ongoing projects underway by FDOT and JEA to address the BMAP in the Open Creek watershed (DEP 2017c).

No recent measurements were available in WIN or STORET between 2015 and 2017 for the following parameters:

  • Arsenic
  • Cadmium
  • Copper
  • Lead
  • Nickel
  • Silver
  • Zinc

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

Table 2.22 Water quality data for Open Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FW5.78
(0 of 9 samples)
5.69
(0 of 8 samples)
6.41
(0 of 6 samples)
≥4.0 SW6.00
(0 of 3 samples)
6.29
(0 of 4 samples)
5.79
(1 of 5 samples)
Total Nitrogen (mg/L)<1.54Not availableNot available0.79
(0 of 12 samples)
Total Phosphorus (mg/L)<0.12Not available0.05
(0 of 4 samples)
0.06
(0 of 10 samples)
Chlorophyll-a (µg/L)<20 FWNot availableNot available3.88
(0 of 6 samples)
<5.4 SWNot available3.20
(0 of 4 samples)
3.31
(0 of 4 samples)
Fecal Coliform (CFU/100 mL)<400650
(9 of 12 samples)
380
(2 of 7 samples)
410
(3 of 6 samples)
Turbidity (NTU)<29Not available2.70
(0 of 4 samples)
4.04
(0 of 10 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.

2.7.24. Pottsburg Creek

2.7.24.1. About Pottsburg Creek

Figure 2.58
Figure 2.59 The Pottsburg Creek Tributary (WBID 2265B).
  • East of the St. Johns River at the Butler Blvd./I-95 interchange
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal coliform with BMAP (2010), Mercury
  • Verified Impaired 2016 (final): Iron (med)
  • WBID Area: 9.1 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.24.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in the Pottsburg Creek WBID 2265B, 2265C (freshwater), and 2265D (marine) (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.25.

2.7.24.3. Discussion

Water quality data for Pottsburg Creek are shown in Table 2.25, but only a handful of measurements are available in STORET for these parameters between 2015 and 2017. Average phosphorus levels were higher than the WQC in 2017 (DEP 2015c; DEP 2016e; DEP 2016k) and near the WQC in 2018.  The percentage of measurements exceeding the WQC dropped sharply in 2018. Historically, average dissolved oxygen and chlorophyll-a were within limits, although chlorophyll-a concentrations in the marine/estuarine regions of Pottsburg Creek exceeded the WQC in 2017 and 2018.

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).  A BMAP for Pottsburg Creek (DEP 2010a) was legally adopted in August 2010. It describes sources of fecal coliform in the watershed, and completed and ongoing activities conducted by state and local agencies that are anticipated to reduce fecal coliform loading in the tributary. Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2.

Annual Progress Reports for this BMAP were published annually between 2011 and 2016, listing repairs, inspections, evaluations, and other improvements conducted by JEA, the Duval County Health Department, COJ, and FDOT. In the 2016 Annual Progress Report, 34% of Pottsburg Creek fecal coliform measurements over a 7.5 year period ending June 30, 2016 exceeded the water quality criterion (400 CFU/100 mL) (DEP 2017c). 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). No fecal coliform data were available in STORET between 2007 and 2017, but measurements from 2018 show decreases in fecal coliform levels compared to what was reported in the BMAP documents. As of 2016, there were 24 projects either planned or currently underway by COJ, JEA, and FDOT to address the BMAP in the Pottsburg Creek watershed (DEP 2017c).

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

Table 2.25 Water quality data for Pottsburg Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0) FWNot availableNot available6.22
(0 of 14 samples)
≥4.0 SWNot availableNot available6.42
(4 of 19 samples)
Total Nitrogen (mg/L)<1.54Not available0.89
(0 of 5 samples)
0.84
(0 of 23 samples)
Total Phosphorus (mg/L)<0.12Not available0.15
(3 of 4 samples)
0.10
(1 of 24 samples)
Chlorophyll-a (µg/L)<20 FWNot availableNot available2.10
(0 of 1 sample)
<5.4 SWNot available9.75
(1 of 4 samples)
10.45
(11 of 15 samples)
Arsenic (µg/L)≤50Not availableNot available1.28
(0 of 21 samples)
Cadmium (µg/L)≤0.3 FWNot availableNot available0.01
(0 of 10 samples)
≤8.8 SWNot availableNot available0.01
(0 of 11 samples)
Copper (µg/L)≤9.3 FWNot availableNot available1.23
(0 of 10 samples)
≤3.7 SWNot availableNot available1.63
(0 of 11 samples)
Lead (µg/L)≤3.2 FWNot availableNot available0.21
(0 of 10 samples)
≤8.5 SWNot availableNot available1.25
(0 of 11 samples)
Nickel (µg/L)≤52 FWNot availableNot available1.11
(0 of 10 samples)
≤8.3 SWNot availableNot available0.62
(0 of 11 samples)
Silver (µg/L)≤0.07 FWNot availableNot available0.01
(0 of 10 samples)
≤0.92 SWNot availableNot available0.01
(0 of 11 samples)
Zinc (µg/L)≤120 FWNot availableNot available3.50
(0 of 10 samples)
≤86 SWNot availableNot available5.23
(0 of 11 samples)
Fecal Coliform (CFU/100 mL)<400Not availableNot available200
(4 of 28 samples)
Turbidity (NTU)<29Not available3.45
(0 of 4 samples)
5.48
(0 of 24 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.