2.7.11. Durbin Creek

2.7.11.1. About Durbin Creek

Figure 2.42
Figure 2.43 The Durbin Creek Tributary (WBID 2365).
  • East of the St. Johns River South of I-295
  • Primary Land Use: Forested
  • Current TMDL reports: Fecal Coliform
  • Verified Impaired 2016 (final): None
  • WBID Area: 26.2 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.11.2. Data sources

Result data were downloaded from the FL STORET website (DEP 2010e) and filtered based on the stations (DEP 2010f) in the Durbin Creek WBID 2365 (DEP 2014d) shown above. The filtered dataset was used to generate Table 2.12.

2.7.11.3. Discussion

Water quality data for Durbin Creek are shown in Table 2.12. Average dissolved oxygen levels in Durbin Creek are relatively low when compared to other tributaries of the LSJRB. However, no causative pollutant (specific environmental condition) has been identified, and thus no TMDL report is required as it is the “natural condition” of the water body (DEP 2009c). Currently, a TMDL report is available for fecal coliform in Durbin Creek (Magley 2006a). (Note: the data analyses in the TMDL are based on different criteria than that used in this report).

Table 2.12 Water quality data for Durbin Creek.
Water QualityConcentrationSampling
ParameterCriteria (FW)LowAverageHighSamplesPeriod
Dissolved Oxygen (mg/L)34% sat. (~3.0)03.939.61581997 - 2016
Total Nitrogen (mg/L)<1.540.281.153.541551997 - 2014
Total Phosphorus (mg/L)<0.120.010.10.622241997 - 2016
Chlorophyll-a (µg/L)<2001.3932.61081997 - 2016
Arsenic (µg/L)≤5000.746.11831997 - 2016
Cadmium (µg/L)≤0.300.121.13831997 - 2016
Copper (µg/L)≤9.300.733.131111997 - 2016
Lead (µg/L)≤3.200.672.44951997 - 2016
Nickel (µg/L)≤5201.5616.2981997 - 2016
Silver (µg/L)≤0.0700.120.72432004 - 2016
Zinc (µg/L)≤12005.8835.071161997 - 2016
Fecal Coliform (log #/100 mL)<2.6-0.31.993.671931999 - 2012
Turbidity (NTU)<290.463.97261711997 - 2016
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.