2.7.29. Trout River About the Trout River

Figure 2.63
Figure 2.64 The Trout River Tributary (WBIDs 2203/2203A/2223).
  • North of downtown Jacksonville
  • Primary Land Use: Residential/Wetland Current TMDL reports: Fecal coliform with BMAP (2010) DO/Nutrients (2203B), Mercury (2203A)
  • Verified Impaired 2016 (final): Chlorophyll-a (2203A, med)
  • Beneficial Use: Class III M/F (Marine 2203A, Freshwater 2203/2233) Data sources

Result data were downloaded from the FL STORET website (DEP 2010e) and filtered based on the stations (DEP 2010f) in the Trout River WBIDs 2203/2203A/2223 (DEP 2014d) shown above. The filtered dataset was used to Table 2.30. Discussion

Water quality data for the Trout River are shown in Table 2.30. Overall (all WBIDs) average phosphorus levels were higher than the recently updated WQC (DEP 2015d; DEP 2016e; DEP 2016k), and average total nitrogen and dissolved oxygen concentrations were within acceptable limits. However, nutrient levels have been found to be, on average, higher than the WQC for WBID 2203 and a TMDL report to address this issue was published in 2009 (Magley 2009a). The Trout River has been listed as impaired for chlorophyll-a (DEP 2016j).

The fecal coliform level, averaged over all the stations in the Trout River (Table 2.30), is below the critical 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 was published in 2009 (Wainwright and Hallas 2009c) for WBIDs 2203 and 2203A in the Trout River. (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for the Trout River (DEP 2010a) was legally adopted in August 2010. It describes sources of fecal coliform in the watershed, and completed and ongoing activities conducted by state and local agencies that are anticipated to reduce fecal coliform loading in the tributary. The BMAP describes two WBIDS: the upper Trout River (2203), and the lower Trout River (2203A). The upper Trout River watershed contains one permitted point source for industrial wastewater, and the lower Trout River contains two of those; both have numerous outfalls for stormwater discharge. The sewer system serves 100% of households in the upper Trout River watershed, and 73% in the lower Trout River watershed. WSEA estimates that there are 819 on-site sewage treatment and disposal systems (septic systems) in use in the upper Trout River, and 2,964 in the lower Trout River. COJ has completed two flood control projects in the lower Trout River watershed. Annual Progress Reports for this BMAP have been published annually since 2011, listing repairs, inspections, evaluations, and other improvements conducted by JEA, the Duval County Health Department, COJ, and FDOT. In the 2016 Annual Progress Report, 32% of lower Trout River fecal coliform measurements over a 7.5 year period ending June 30, 2016 exceeded the water quality criterion (400 CFU/100 mL) (DEP 2017a). While the lower Trout River remains impaired for fecal coliform, the size of the exceedances has decreased since implementation of the BMAP; the median exceedance decreased from 1,000 CFU/100 mL in the TMDL report to 721 CFU/100 mL in the first phase of the BMAP (2010-2014) (DEP 2016b). There are 42 projects either planned or currently underway by COJ, JEA, and FDOT to address the BMAP in the Trout River watershed (DEP 2017a).

The Trout River (lower reach) was identified as being impaired for mercury based on elevated levels of mercury in fish tissue; however, this is being delisted (DEP 2016h), as it has been addressed by the statewide mercury TMDL (DEP 2013e). Chlorophyll-a has been added to the verified impaired list (DEP 2016j).

Table 2.30 Water quality data for the Trout River.
Water QualityConcentrationSampling
ParameterCriteria (FW)LowAverageHighSamplesPeriod
Dissolved Oxygen (mg/L)34% sat. FW ?4.0 SW0.55.2610.833691997 - 2016
Total Nitrogen (mg/L)<1.540.321.243.351311997 - 2014
Total Phosphorus (mg/L)< - 2014
Chlorophyll-a (µg/L)<20 FW <11 SW0.28552961997 - 2014
Arsenic (µg/L)≤50 FW ≤50 SW0.251.623.1522006 - 2007
Cadmium (µg/L)≤0.3 FW ≤8.8 SW0.012.8215882000 - 2007
Copper (µg/L)≤9.3 FW ≤3.7 SW0.02350932000 - 2007
Lead (µg/L)≤3.2 FW ≤8.5 SW04.3750892000 - 2008
Nickel (µg/L)≤52 FW ≤8.3 SW02.5350932000 - 2007
Silver (µg/L)≤0.07 FW ≤0.92* SW0.010.245562000 - 2007
Zinc (µg/L)≤120 FW ≤86 SW0.047.5750952000 - 2007
Fecal Coliform (log #/100 mL)<2.6-0.32.914.663022000 - 2016
Turbidity (NTU)<2907.15391551997 - 2014
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.