2.7.15. Hogan Creek About Hogan Creek

Figure 2.47
Figure 2.48 The Hogan Creek Tributary (WBID 2252).
  • Downtown Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009)
  • Verified Impaired 2016 (final): None
  • WBID Area: 3.4 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater) Data sources

Result data were downloaded from the FL STORET website (DEP 2010e) and filtered based on the stations (DEP 2010f) in the Hogan Creek WBID 2252 (DEP 2014d) shown above. The filtered dataset was used to generate Table 2.16. Discussion

Water quality data for Hogan Creek are shown in Table 2.16. Average phosphorus levels were higher than the recently updated WQC (DEP 2015d; DEP 2016e; DEP 2016k). Average total nitrogen and chlorophyll-a concentrations were within acceptable limits. (Note: the datasets for these parameters are relatively small in comparison to other parts of the basin). As the average level of dissolved oxygen is below the WQC, Hogan Creek has been identified as being impaired for this parameter.

The fecal coliform level, averaged over all the stations in Hogan Creek, is just below the reference level of 2.6, which is the logarithm of the state maximum of 400 colony-forming-units (cfu) per 100 mL. However, a TMDL for fecal coliform in Hogan Creek was finalized in 2006 (Wainwright 2006d). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Hogan Creek was legally adopted in December 2009 (DEP 2009b). Annual Progress Reports for this BMAP were issued in 2011 (DEP 2011a), 2012 (DEP 2012), and 2013 (DEP 2013a); they list repairs, inspections, evaluations, and other improvements conducted by JEA, the Duval County Health Department, COJ, and FDOT.

Table 2.16 Water quality data for Hogan Creek.
ParameterWater Quality Criteria (SW)LowAverageHighSamplesSampling Period
Dissolved Oxygen (mg/L)34% sat. (~3.0)0.44.7110.62401999 - 2012
Total Nitrogen (mg/L)<1.54‡0.671.021.392000 - 2007
Total Phosphorus (mg/L)<0.12‡ - 2007
Chlorophyll-a (μg/L)<20‡0.613.552662000 - 2007
Arsenic (μg/L)≤500.561.12.152007
Cadmium (μg/L)≤ - 2007
Copper (μg/L)≤ - 2007
Lead (μg/L)≤ - 2007
Nickel (μg/L)≤520.530.98262001 - 2007
Silver (μg/L)≤ - 2007
Zinc (μg/L)≤1207.714.92862001 - 2007
Fecal Coliform (log #/100 mL)<2.6‡- - 2012
Turbidity (NTU)<293.97.1318232000 - 2007
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
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.