FLORIDA GEOLOGICAL SURVEY Utilization Jackson Blue Spring is a county swimming and recreational park. Discharge Historical measurements were obtained from Bulletin No. 31 (Rosenau et al., 1977). Current discharge measurement was calculated at Turner Landing, below the dam at Merritts Mill Pond. All discharge rates are measured in ft3/s. January 24, 1929 December 22, 1934 May 20, 1942 November 15, 1946 January 30, 1947 August 6, 1973 December 17, 2001 134 56 265 178 178 287 61 Table 31. Jackson Blue Spring water quality analysis. 2001 Analytes 1924 1946 1972 20 Unfilt. Filter Field Measures Temperature 20.5 20.9 - DO 7.8 7.26 - pH 7.5 7.5 7.58 - Sp. Cond. 220 243 - Lab Analytes BOD 0.0 0.2 AU - Turbidity 0 0.05 U Color 0 5U Alkalinity 98 108 109 Sp. Cond. 270 - TDS 139 TSS 4U Cl 2.0 2.5 2.5 3.7 3.8A SO4 2.4 0.9 0.0 1 1.1 A F 0.0 0.1 0.036 10.0351 Nutrients TOC 0.0 1 U NO3+NO2 1.4 3.3 3.3 NH3+ NH4 0.01 U 0.01 U TKN 0.0741 0.06 U P 0.02 0.023 0.022 PO4 0.02 0.02 A=Average Value U,K=Compound not detected, value I=Value shown is less than the practical quantitation limit 2001 Analytes 1924 1946 1972 U Unfilt. Filter Metals Ca 43 38 37 44.5 43.6 K 0.4 0.2 0.29 0.29 Na 2.3 1.7 1.6 1.73 1.54 Mg 1.0 2.1 2.1 2.3 2.1 As 10 3U 3U Al 75 U B 0 30 U Cd 0.75 U 0.5U Co 0 0.75 U Cr 1 2U 2U Cu 10 2U 2U Fe 25 U 20 U Mn 0.5U 0.5U Ni 2U 2U Pb 2 5U 3U Se 3.5 U 3.5 U Sn 7U Sr 40 321 Zn 4U 3.5U shown is the method detection limit J=Estimated value Table 32. Jackson Blue Spring bacteriological analysis. Bacteria Results (in #/100 mL) Analyte Value Escherichia coli 1 K Enterococci 1 K Fecal Coliform 1 K Total Coliform 1 K