2.7.29. Trout River

2.7.29.1. 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)

2.7.29.2. 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/2203B/2223 (DEP 2014c) shown above. The filtered dataset was used to Table 2.25.

2.7.29.3. Discussion

Water quality data for the Trout River are shown in Table 2.25. Historically, overall (all WBIDs) average phosphorus levels were higher than the recently updated WQC (DEP 2015c; DEP 2016e; DEP 2016k).  No phosphorus data were available in STORET from 2014 to 2016, and the average phosphorus concentration in 2017 was at the WQC.  Dissolved oxygen concentrations were within acceptable limits. 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 2.25), has been higher than the WQC of 400 colony-forming-units (CFU) per 100 mL.  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 middle Trout River (2203), and the lower Trout River (2203A). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2.

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 2017c). 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). However, fecal coliform concentrations over the past three years have remained high (although limited sampling was performed in 2017). There are 42 projects either planned or currently underway by COJ, JEA, and FDOT to address the BMAP in the Trout River watershed (DEP 2017c).

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 2013c). Chlorophyll-a has been added to the verified impaired list (DEP 2016j).

No recent measurements were available in STORET between 2015 and 2017 for the following parameters:

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

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

Table 2.25 Water quality data for the Trout River (2015-2017).

 Water QualityAverage and Number of Samples º
ParameterCriteria201520162017
Dissolved Oxygen (mg/L)≥34% sat.
(≥3.0) FW
5.46
(6 of 20 samples)
4.96
(4 of 15 samples)
4.67
(2 of 7 samples)
≥4.0 SW3.96
(4 of 7 samples)
4.58
(4 of 12 samples)
4.83
(4 of 12 samples)
Nitrate-nitrite N (mg/L)§§No dataNo data0.09
(6 samples)
Total Phosphorus (mg/L)<0.12No dataNo data0.12
(2 of 6 samples)
Chlorophyll-a (µg/L)<20 FWNo dataNo dataNo data
<5.4 SWNo dataNo data7.45
(2 of 6 samples)
Fecal Coliform (CFU/100 mL)<400880
(4 of 7 samples)
330
(2 of 12 samples)
1500
(2 of 3 samples)
Turbidity (NTU)<29No dataNo data5.90
(0 of 6 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
º = Number of samples below WQC for Dissolved Oxygen, Number of samples above WQC 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.
§ = No water quality criterion has been established for Nitrate-Nitrite nitrogen. No Total Nitrogen data were available in STORET for 2015-2017.