2.7.30. Wills Branch

2.7.30.1.  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), Mercury
  • Verified Impaired 2016 (final): None
  • Beneficial Use: Class III  F (Recreational – Freshwater)

2.7.30.2. 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 Wills Branch WBID 2282 (DEP 2014c) shown above. No water quality data for the selected parameters discussed below for Wills Branch were available in STORET for 2015-2017.

2.7.30.3. Discussion

Water quality data for Wills Branch are presented in Table 2.30.  Historically, average total phosphorus, dissolved oxygen and chlorophyll-a concentrations were within acceptable limits, and reported measurements from 2018 continue this trend.

The fecal coliform level, averaged over all the stations in Wills Branch, were historically above the WQC 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). 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 20 active, ongoing projects underway by FDOT and JEA to address the BMAP in the Wills Branch watershed (DEP 2017c); two pump station projects were completed by JEA in 2016.  No fecal coliform measurements were reported in STORET from 2013 to 2017, and measurements from 2018 showed elevated fecal coliform levels.

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

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

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

Table 2.30 Water quality data for Wills Branch.

 Water QualityAverage and Number of Samples º
ParameterCriteria201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)Not availableNot available7.24
(0 of 18 samples)
Total Nitrogen (mg/L)<1.54Not availableNot available0.96
(0 of 8 samples)
Total Phosphorus (mg/L)<0.12Not availableNot available0.06
(0 of 9 samples)
Chlorophyll-a (µg/L)<20Not availableNot available1.41
(0 of 9 samples)
Fecal Coliform (CFU/100 mL)<400Not availableNot available1100
(17 of 18 samples)
Turbidity (NTU)<29Not availableNot available3.61
(0 of 9 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.