2.7.30. Wills Branch  About the Wills Branch

Figure 2.64
Figure 2.65 The Wills Branch Tributary (WBIDs 2282).
  • West of downtown Jacksonville Flows into the Cedar River
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal and Total Coliform with BMAP (2010)
  • Verified Impaired 2016 (final): None
  • 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 Wills Branch WBID 2282 (DEP 2014d) shown above. The filtered dataset was used to generate Table 2.31. Discussion

Water quality data for Wills Branch are shown in Table 2.31. Average total phosphorus, total nitrogen, dissolved oxygen and chlorophyll-a concentrations were within acceptable limits. The fecal coliform level, averaged over all the stations in Wills Branch, are above the critical level of 2.6, which is the logarithm of the state maximum of 400 colony-forming-units (cfu) per 100 mL. As a result, a TMDL for total and fecal coliform was published in 2006 (Wainwright 2006c) for Wills Branch. (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Wills Branch was legally adopted in 2010 (DEP 2010a). Annual Progress Reports for this BMAP were published in 2011 (DEP 2011b), 2012 (DEP 2013b), and 2013 (DEP 2013b); they list repairs, inspections, evaluations, and other improvements conducted by JEA, the Duval County Health Department, COJ, and FDOT.

Table 2.31 Water quality data for Wills Branch.
ParameterWater Quality Criteria (SW)LowAverageHighSamplesSampling Period
Dissolved Oxygen (mg/L)34% sat. (~3.0)0.226.6713.282351999 - 2013
Total Nitrogen (mg/L)<1.54‡0.340.992.91742001 - 2013
Total Phosphorus (mg/L)<0.12‡ - 2013
Chlorophyll-a (μg/L)<20‡0.12.831472002 - 2013
Arsenic (μg/L)≤500.250.752.55302005 - 2008
Cadmium (μg/L)≤0.30.0021.7190642002 - 2008
Copper (μg/L)≤ - 2008
Lead (μg/L)≤3.205.2250792002 - 2008
Nickel (μg/L)≤5203.3550742002 - 2008
Silver (μg/L)≤0.070.0050.0130.039302005 - 2008
Zinc (μg/L)≤1200.046.8750802002 - 2008
Fecal Coliform (log #/100 mL)<2.6‡0.542.674.71981999 - 2012
Turbidity (NTU)<2904.0118922001 - 2013
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.