St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District
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Water bodies, watersheds and storm water
Satsuma Spring main view

Satsuma Spring main view

Satsuma Spring boil

Satsuma Spring boil

Satsuma Spring private property sign

Satsuma Spring private property sign

Satsuma Spring

Putnam County

Description

Satsuma Spring is a low third-magnitude spring with a circular pool 22 feet in diameter. Clear, blue water discharges from a 5-foot-diameter opening in the bottom of the pool. A prominent boil is visible on the pool surface, and there is a strong hydrogen sulfide odor. The sand bottom was covered with organic debris and algae. The spring run flows about 0.2 mile toward the northwest to the St. Johns River.

Discharge

Discharge at Satsuma Spring was measured 14 times by St. Johns River Water Management District from 1993 to 2001. The difference between the minimum and maximum discharges is 0.78 cubic feet per second (cfs) over the period. The maximum measured discharge of 1.54 cfs occurred in September 2000; the minimum discharge of 0.76 cfs occurred in May 2000. The mean and median discharges for the period are 1.11 cfs and 1.11 cfs, respectively (see the table below).

Water quality

Satsuma Spring was sampled 15 times by the district from 1993 to 2001. Summary statistics of the water quality data for selected variables are shown in the table below.

Summary statistics of water quality and discharge at Satsuma Spring

Satsuma Spring Min Mean Median Max Count Period
Discharge, cfs 0.76 1.11 1.11 1.54 14 1993−2001
Alkalinity, total, mg/L as CaCO3 93.1 96.7 96.4 102.0 13 1995−2001
Calcium, total, mg/L as Ca 103.1 120.7 118.1 142.9 15 1993−2001
Chloride, total, mg/L as Cl 1290.0 1606.5 1596.0 1878.1 14 1993−2001
Dissolved Oxygen 0.55 0.55 0.55 0.55 1 2001
Fluoride, total, mg/L as F 0.29 0.32 0.32 0.34 14 1995−2001
Magnesium, total, mg/L as Mg 75.6 92.7 95.4 106.0 15 1993−2001
Nitrate + nitrite, total, mg/L as N 0.01 0.01 0.01 0.01 2 1995−1999
Orthophosphate, total, mg/L as P 0.02 0.03 0.03 0.03 13 1995−2001
pH, field 7.03 7.46 7.41 7.93 14 1993−2001
Phosphorus, total, mg/L as P 0.03 0.03 0.03 0.03 1 2001
Potassium, total, mg/L as K 24.0 28.3 28.6 32.8 15 1993−2001
Sodium, total, mg/L as Na 712.8 884.0 909.0 1040.0 15 1993−2001
Specific conductance, field, µmhos/cm at 25°C 4740 5687 5914 6190 11 1993−2001
Specific conductance, lab, µmhos/cm at 25°C 4660 5464 5543 6190 3 1993−2001
Sulfate, total, mg/L as SO4 213.3 253.9 261.5 274.0 14 1995−2001
Total dissolved solids, mg/L 2500 3080 3130 3500 13 1993−2001
Water temperature, °C 23.1 24.6 24.7 25.0 16 1993−2001
Units: µmhos/cm = micromhos per centimeter
         mg/L = milligrams per liter
         cfs = cubic feet per second

Age of discharge water

The age of water discharging from Satsuma Spring was determined by measuring the concentration of tritium, delta carbon-13, and carbon-14 in the spring discharge, which was measured in May 2001. Satsuma Spring had a tritium concentration of 0.85 tritium units, which suggests that the water is less than 48 years old. Satsuma Spring had a delta carbon-13 value of −7.01 parts per thousand and a carbon-14 concentration of 20% modern carbon, which results from the mixing of Upper and Lower Floridan aquifer water. The Fontes and Garnier (1979) carbon-14 age is approximately 2,500 years old.

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St. Johns River Water Management District
4049 Reid Street, Palatka, FL 32177
(800) 725-5922