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
Blueberry Spring main view

Blueberry Spring main view
photo by T. Roberts, FGS

Blueberry Spring

Lake County

Description

Blueberry Spring is a fifth-magnitude spring that discharges from a small sand boil in the hillside. The circular pool is about 5 feet in diameter, with organic debris and white sulfur-reducing bacteria covering the pool bottom. Several more sand boils are present in the run further down the hillside. The spring runs toward the east to Black Water Creek.

Discharge

Blueberry Spring close-up view

Blueberry Spring close-up view

The only discharge measurement of 0.07 cubic feet per second was measured by the U.S. Geological Survey in 1997.

Water quality

Blueberry Spring was sampled by Lake County in April and September 2004. Summary statistics of the water quality data for selected variables are shown in the table below.

Summary statistics of water quality and discharge at Blueberry Spring

Blueberry Spring Min Mean Median Max Count Period
Discharge, cfs 0.07 0.07 0.07 0.07 1 1997
Alkalinity, total, mg/L as CaCO3 115.0 115.4 115.4 115.8 2 2004
Calcium, total, mg/L as Ca 116.3 118.2 118.2 120.0 2 2004
Chloride, total, mg/L as Cl 397.9 420.5 420.5 443.0 2 2004
Dissolved Oxygen 0.30 0.30 0.30 0.30 2 2004
Magnesium, total, mg/L as Mg 41.7 44.0 44.0 46.3 2 2004
Nitrate + nitrite, total, mg/L as N 0.03 0.03 0.03 0.03 1 2004
pH, field 7.30 7.44 7.50 7.53 3 1997−2004
Potassium, total, mg/L as K 7.5 7.6 7.6 7.7 2 2004
Sodium, total, mg/L as Na 204.0 204.0 204.0 204.0 1 2004
Specific conductance, field, µmhos/cm at 25°C 2031 2046 2046 2060 2 2004
Specific conductance, lab, µmhos/cm at 25°C 1898 1898 1898 1898 1 1997
Sulfate, total, mg/L as SO4 279.5 279.5 279.5 279.5 1 2004
Total dissolved solids, mg/L 1099 1120 1120 1140 2 2004
Water temperature, °C 23.2 23.7 23.7 24.0 4 1997−2005
Units: µmhos/cm = micromhos per centimeter
         mg/L = milligrams per liter
         cfs = cubic feet per second

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