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.