2.7.22. Ortega River

2.7.22.1. About the Ortega River

Figure 2.56
Figure 2.57 The Ortega River Tributary (WBID 2213P1 and 2249A).
  • West of NAS Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform – 2213P1 DO/Nutrient   2213P1
  • Verified Impaired 2016 (final): None
  • WBID Area: 29.0 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.22.2. 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 Ortega River WBID 2213P1 and 2249A (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.23.

2.7.22.3. Discussion

Water quality data for the Ortega River are shown in Table 2.23. Average total phosphorus and dissolved oxygen concentrations were within acceptable limits. Average chlorophyll-a concentrations have remained lower than the WQC, but there was a sharp increase in the average concentration in 2017. Concentrations of metals in the Ortega River had generally decreased from 2015 to 2017, although the concentration of many of the metals shown in Table 2.23 rose in 2018.

No valid fecal coliform measurements were available in STORET between 2013 and 2017, but measurements were reported in WIN in 2018.  The fecal coliform level, averaged over all the sampling sites in the Ortega River, was historically below the WQC of 400 colony-forming-units per 100 mL. The TMDL reports for fecal coliform (Rhew 2009f) and DO/Nutrients (Magley 2009b) published in 2009 referred to WBID 2213P, of which WBID 2213P1 is a subset as a result of changes to the WBID boundaries.

Historical water quality data for the Ortega River are available in previous versions of the River Report.

Table 2.23 Water quality data for the Ortega River.

 Water QualityAverage and Number of Samples º
ParameterCriteria (FW)201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)4.51
(2 of 7 samples)
4.78
(3 of 7 samples)
6.68
(1 of 25 samples)
Total Nitrogen (mg/L)<1.540.67
(0 of 6 samples)
0.95
(0 of 5 samples)
1.03
(0 of 5 samples)
Total Phosphorus (mg/L)<0.120.05
(0 of 11 samples)
0.09
(3 of 10 samples)
0.07
(1 of 18 samples)
Chlorophyll-a (µg/L)<200.57
(0 of 7 samples)
7.69
(1 of 7 samples)
6.88
(1 of 14 samples)
Arsenic (µg/L)≤500.65
(0 of 7 samples)
0.61
(0 of 3 samples)
2.75
(0 of 5 samples)
Cadmium (µg/L)≤0.30.03
(0 of 7 samples)
0.03
(0 of 3 samples)
0.13
(0 of 5 samples)
Copper (µg/L)≤9.31.37
(0 of 7 samples)
0.81
(0 of 3 samples)
2.75
(0 of 5 samples)
Lead (µg/L)≤3.20.46
(0 of 7 samples)
0.38
(0 of 3 samples)
0.50
(0 of 5 samples)
Nickel (µg/L)≤520.42
(0 of 7 samples)
0.34
(0 of 3 samples)
0.25
(0 of 5 samples)
Silver (µg/L)≤0.070.00
(0 of 7 samples)
0.00
(0 of 3 samples)
0.13
(2 of 5 samples)
Zinc (µg/L)≤1205.44
(0 of 7 samples)
4.04
(0 of 3 samples)
7.50
(0 of 5 samples)
Fecal Coliform (CFU/100 mL)<400Not availableNot available360
(3 of 10 samples)
Turbidity (NTU)<291.45
(0 of 7 samples)
3.25
(1 of 7 samples)
4.56
(0 of 14 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.