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Everglades Water Chemistry Data


Methods for Evaluating Everglades Water Chemistry Data

Summary statistics for standard reference water samples and distilled-water blank samples are given in table 1.

Samples that had analytical results less than the detection limits of the selected methods are indicated in the data set by the less than symbol. The detection limits of quantification are listed in table 2.


TABLE 1. Summary Statistics for Standard Reference Water Samples (SRWS) and Distilled-Water Blank Samples (SBL)

(mg/L, milligrams per liter; ueq/L, microequivalents per liter; umol/L, micromoles per liter; MPV, most probable value; N, number of samples; N/A, not available)

Constituent Sample Units Mean1 of reported values Standard1 deviation Range Number of samples Expected value
Minimum1 Maximum1 Less than detection N 95% confidence MPV Standard deviation N
Alkalinity M102 ueq/L 3490 4 3490 3490 0 3 3520+/-20 80 64
SBL ueq/L -44 13 -52 -29 0 3
B M102 mg/L 0.313 0.017 0.287 0.338 0 9 0.31+/-0.014 0.038 29
M96 mg/L 0.083 0.008 0.072 0.094 0 7 0.115+/-0.021 0.054 26
SBL mg/L <0.007 N/A <0.007 <0.007 10 10
T107 mg/L 0.128 0.012 0.119 0.146 0 8 0.13+/-0.007 0.021 37
Ba SBL mg/L 0.002 N/A 0.002 0.002 9 10
T107 mg/L 0.215 0.014 0.199 0.238 0 8 0.192+/-0.003 0.011 53
Ca M102 ueq/L 4020 140 3830 4270 0 9 4100+/-50 200 65
M96 ueq/L 2190 70 2090 2290 0 7 2160+/-20 100 63
SBL ueq/L 0.9 0.1 0.7 1.1 1 10
T107 ueq/L 580 30 550 630 0 8 584+/-10 30 60
Cl M104 ueq/L 2000 9 1990 2020 0 5 1950+/-20 79 64
M110 ueq/L 7520 40 7460 7560 0 5 7500+/-80 310 77
DOC KPH mg/L 0.27 0.08 0.18 0.33 0 7 0.2 N/A N/A
KPH mg/L 10 0.4 9.5 10.5 0 7 10.2 N/A N/A
KPH mg/L 29.9 1.7 26.5 31.8 0 7 30.2 N/A N/A
Fe SBL mg/L <0.006 N/A <0.006 <0.006 10 10
T107 mg/L 0.052 0.007 0.045 0.061 0 8 0.052+/-0.002 0.007 68
H4SiO4 M102 umol/L 108 5 100 114 0 9 110+/-2 8 45
M96 umol/L 234 12 214 249 0 7 226+/-7 22 46
SBL umol/L 7 N/A 7 7 9 10
T107 umol/L 134 9 125 149 0 8 130+/-3 8 43
Li SBL mg/L 0.01 N/A 0.01 0.01 9 10
T107 mg/L 0.195 0.019 0.174 0.228 0 8 0.193+/-0.007 0.014 21
Mg M102 ueq/L 4790 230 4340 5150 0 9 4800+/-0 200 66
M96 ueq/L 1770 90 1610 1870 0 7 1790+/-20 91 61
SBL ueq/L 2.1 2.3 0.9 5.5 6 10
T107 ueq/L 174 17 151 208 0 8 173+/-2 11 61
Mn SBL mg/L 0.0007 N/A 0.0007 0.0007 9 10
T107 mg/L 0.046 0.003 0.043 0.05 1 8 0.045+/-0.002 0.006 68
Na M102 ueq/L 4800 400 4200 5200 0 9 4698+/-52 200 66
M96 ueq/L 2600 300 2300 2900 0 7 2540+/-30 110 58
SBL ueq/L 3.5 1.7 1.3 7.2 0 10
T107 ueq/L 940 100 820 1110 0 8 900+/-10 48 65
pH M102 8.56 0.04 8.53 8.6 0 3 8.4+/-0 0.1 69
SBL 5.4 0.5 4.9 6 0 3
SO4 M112 ueq/L 540 12 521 555 0 7 521+/-6 31 95
M96 ueq/L 2830 0.7 2830 2840 0 6 2890+/-40 160 55
P11 ueq/L 15.9 0.2 15.6 16.1 0 3 22.1+/-4 7.7 15
SBL ueq/L >8.3 N/A >8.3 >8.3 45 47
Sr M102 mg/L 1.37 0.06 1.29 1.46 0 9 1.34+/-0.037 0.093 24
M96 mg/L 0.57 0.03 0.54 0.61 0 7 0.538+/-0.012 0.029 21
SBL mg/L 0.0006 N/A 0.0006 0.0006 9 10
T107 mg/L 0.065 0.006 0.058 0.075 0 8 0.061+/-0.001 0.004 29
Zn SBL mg/L 0.01 N/A 0.01 0.01 9 10
T107 mg/L 0.09 0.01 0.08 0.11 0 8 0.0758+/-0.0025 0.0099 68

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TABLE 2. Detection Limits for Onsite and Laboratory Analyses

(mg/L, milligrams per liter; ueq/L, microequivalents per liter; umol/L, micromoles per liter)

Parameter Units Detection limit Method of analysis
Alkalinity (ueq/L) none "Fishman and Friedman, 1985, p. 93-95"
B (mg/L) 0.007 "Garbarino and Taylor, 1979, 1980"
Ba (mg/L) 0.002 "Garbarino and Taylor, 1979, 1980"
Ca (ueq/L) 0.3 "Garbarino and Taylor, 1979, 1980"
Cl (ueq/L) 1400 "Cotlove and others, 1958"
DOC (mg/L) 0.1 "Aiken, 1992"
Fe (mg/L) 0.006 "Garbarino and Taylor, 1979, 1980"
H4SiO4 (umol/L) 5 "Garbarino and Taylor, 1979, 1980"
K (ueq/L) 3 "Skougstad and others, 1979"
Li (mg/L) 0.007 "Garbarino and Taylor, 1979, 1980"
Mg (ueq/L) 0.6 "Garbarino and Taylor, 1979, 1980"
Mn (mg/L) 0.0005 "Garbarino and Taylor, 1979, 1980"
Na (ueq/L) 0.4 "Garbarino and Taylor, 1979, 1980"
SO4 (ueq/L) 8.3 or 240 "Fishman and Friedman, 1985, p. 617"
Sr (mg/L) 0.0006 "Garbarino and Taylor, 1979, 1980"
Zn (mg/L) 0.01 "Garbarino and Taylor, 1979, 1980"

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Last updated: 15 January, 2013 @ 12:42 PM (KP)