Middle St. Johns - Florida Department of Environmental Protection

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166 Water Quality Assessment Report: Middle St. Johns Table 4.2 (contined) Planning Unit Lake Monroe Unit Lake Monroe Unit Lake Monroe Unit Lake Monroe Unit Lake Monroe Unit WBID Waterbody Segment 2962 Smith Canal 2962 Smith Canal 2973 DeForest Lake Outlet 2973F 2981A DeForest Lake Lake Jesup Near St. Johns River Waterbody Type Stream 1998 303(d) Parameters of Concern Coliform Bacteria Parameters Identified Using the 2002 Impaired Surface Waters Rule Fecal Coliform Bacteria Priority for TMDL Development * Projected Year for TMDL Development * Comments Low 2008 Planning period: 1/4 values exceed criterion; verified period: 8/30 values exceed criterion. Coliform median 247 colonies/100 ml, range 1–870 colonies/100 ml. No more than 2 values per month. Stream Iron Iron Low 2008 Planning period: 0/1 values exceed criterion; verified period: 7/22 values exceed criterion. Stream DO Medium 2008 Planning period: 12/17 values below DO criterion; verified period: 17/25 values below DO criterion. DO met verification threshold of IWR and BOD is causative pollutant (BOD median = 3.8 mg/L). 25 DO values, median 3.5 mg/L, mean 3.89 mg/L, range 1.46–7.1 mg/L. Lake Nutrients (TSI) Lake Nutrients Nutrients (TSI) Medium 2008 Colimitation of N and P based a TN/TP median of 33 (36 values) in the planning period and a median of 33 (44 values) in the verified period. Planning period: 1 TSI annual mean exceeded 60 (1999); verified period: 1 TSI annual mean exceeded 60 (1999). 18 TN values, median 0.86 mg/L. 44 TP values, median 0.027 mg/L. High 2004 Colimitation of N and P based on a TN/TP median of 19 (100 values) during the planning period and a median of 20 (86 values) during the verified period. Planning period: 5 TSI annual means exceeded 60 (1995–1999); verified period: 4 TSI annual means exceeded 60 (1996– 1999). 68 TN values, median 2.2 mg/L. 109 TP values, median 0.11 mg/L.
Water Quality Assessment Report: Middle St. Johns 167 Table 4.2 (contined) Planning Unit Lake Woodruff Unit Wekiva River Wekiva River Wekiva River WBID 2893U 2934A Waterbody Segment Lake Beresford Cowpen Pond 2987 Little Wekiva River 2987 Little Wekiva River Waterbody Type Lake Lake Stream Stream 1998 303(d) Parameters of Concern Coliform Bacteria Coliform Bacteria Parameters Identified Using the 2002 Impaired Surface Waters Rule Nutrients (TSI) Mercury in Fish Fecal Coliform Bacteria Total Coliform Bacteria Priority for TMDL Development * Projected Year for TMDL Development * Comments Medium 2008 Colimitation of N and P based on a TN/TP median of 19 (411 values) in the planning period and a median of 18 (272 values) in the verified period. Planning period: 7 TSI annual means exceeded 60 (1992–1994, 1996, 1997, 1999, 2000); verified period: 6 TSI annual means exceeded 60 (1996, 1997, 1999–2002). 373 TN values, median 1.26 mg/L. 492 TP values, median 0.07 mg/L. Medium 2011 Mercury in Fish met verification threshold of IWR. Fish tissue levels in 20 samples averaged 0.9135 ppm in 2000. Low 2008 Planning period: 23/49 values exceed criterion; verified period: 20/44 values exceed criterion. Coliform median 420 colonies/100 ml, range 1.0–5800 colonies/ 100 ml. No more than 5 values per month. Low 2008 Planning period: 9/33 values exceed criterion; verified period: 5/24 values exceed criterion. Coliform median 2000 colonies/100 ml, range 120–24,000 colonies/100 ml. No more than 5 values per month.
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Middle St. Johns - Florida Department of Environmental Protection

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