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 2019 (JEA 2019b).
Figure 2.46 The Julington Creek Tributary (WBID 2351) with sanitary sewer overflows reported by JEA in 2019 (JEA 2019b).

2.7.17.2. Data sources

Data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018c) and filtered based on the stations (DEP 2010g) in Julington Creek WBID 2351 (DEP 2014c) shown above. The filtered dataset reflects water column concentrations and 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, and FDEP considers it a medium priority to develop a TMDL in response (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). Average fecal coliform levels in 2018 were higher than the WQC, and fecal coliform levels decreased in 2019 with fewer individual samples exceeding the WQC.

No recent measurements were available in WIN or STORET between 2017 and 2019 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)201720182019
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)Not available6.97
(0 of 13 sample)
6.61
(0 of 12 samples)
Total Phosphorus (mg/L)<0.12Not available0.05
(0 of 1 sample)
Not available
Chlorophyll-a (µg/L)<20Not available2.90
(0 of 1 sample)
Not available
Arsenic (µg/L)≤50Not available1.32
(0 of 1 sample)
Not available
Cadmium (µg/L)≤0.3Not available0.01
(0 of 1 sample)
Not available
Copper (µg/L)≤9.3Not available2.49
(0 of 1 sample)
Not available
Iron (mg/L)≤1.0Not available1.17
(0 of 1 sample)
Not available
Lead (µg/L)≤3.2Not available0.13
(0 of 1 sample)
Not available
Nickel (µg/L)≤52Not available0.50
(0 of 1 sample)
Not available
Silver (µg/L)≤0.07Not available0.01
(0 of 1 sample)
Not available
Zinc (µg/L)≤120Not available2.50
(0 of 1 sample)
Not available
Fecal Coliform (CFU/100 mL)<400Not available590
(7 of 12 sample)
330
(4 of 12 samples)
Turbidity (NTU)<29Not available4.00
(0 of 1 sample)
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.