OPEN FILE REPORT NO. 85


Table 15. Ichetucknee Springs Group water quality analyses.


 Main Blue Hole Cedar Head Mission
 Analytes 1946 1975 2001 2001 2001 2001
 Unfilt. Filter Unfilt. Filter Unfilt. Filter Unfilt. Filter
Field Measures
Temperature 22.2 21.0 22.0 21.9 21.9 21.8
DO 4.5 3.52 2.01 2.98 0.63
pH 7.7 7.6 7.91 7.49 7.41 7.91
Sp. Cond. 329 290 319 287 299 312
Lab Analytes
BOD 2.0 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UAJ
Turbidity 1 0.05 U 0.1 0.05 U 0.05 U
Color 0 1 5U 5 U 5U 5U -
Alkalinity 140 154 154 145 145 151 151 148 147
Sp. Cond. 320 290 300 310
TDS 183 171 168 172
TSS 0 4U 4U 4U 4U
Cl 3.6 4.4 3.6 3.7 4.3 4.3 3.9 3.9 5.4 5.4 A
SO4 8.4 6.9 8.3 8.5 4.8 4.9 5.3 5.4 8.7 8.8 A
F 0.1 0.4 0.1 0.097 0.11 0.11 0.A 0.1 0.0911 0.14 0.13
Nutrients
TOC 0.0 1U 1U 1U 1U
N03 + N02 0.37 0.83 0.84 0.7 0.72 0.86 0.89 0.51 0.53
NH3+NH4 0.015 I 0.012 I 0.011 0.01 U 0.011 0.011 I 0.01 U 0.019
TKN 0.06 U 0.06 U 0.06 U 0.06 U 0.06 U 0.06 U 0.06 U 0.06 U
P 0.05 0.023 0.022 J 0.048 0.048 J 0.033 0.034 J 0.059 0.05 JA
P04 0.05 0.02 0.044 0.027 0.056
Metals
Ca 58 52 54.5 52.5 47.9 48.4 54 51.2 49.7 48.6
K 0.3 0.3 0.15 0.14 0.31 0.33 0.22 0.22 0.46 0.48
Na 3.1 3.4 2.12 2.02 2.67 2.45 2.37 2.26 3.65 3.53
Mg 6.6 6.0 5.8 5.8 4.7 4.8 5.3 5.2 6.3 6.4
As 1 3U 3U 3U 3U 3U 3U 3U 3U
Al 75 U 75 U 75 U 75 U
B 25 U 25 U 25 U 25 U
Cd 0 0.75 U 0.75 U 0.75 U 0.75 U 0.75 U 0.75 U 0.75 U 0.75 U
Co 0.75 U 0.75 U 0.75 U 0.75 U
Cr 2U 2U 2U 2U 2U 2U 2U 2U
Cu 3 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 4.41 2.5 U
Fe 30 340 35 U 20 U 35 U 20 U 35 U 20 U 35 U 20 U
Mn 20 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U
Ni 0 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U
Pb 7 5U 4U 5U 4U 5U 4U 5U 4U
Se 4U 4U 4U 4U 4U 4U 4U 4U
Sn 10 U 10 U 10 U 10 U
Sr 170 156 76 105 107
Zn 0 5U 5U 5U 5U 5U 5U 5U 5U
A=Average Value U,K=Compound not detected, value shown is the method detection limit
I=Value is less than practical quantitation limit J=Estimated value Q=exceeded holding time limit