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
Catfish Springs main view

Catfish Springs main view

Catfish Springs

Marion County

Description

Catfish Springs is a third-magnitude spring that is presently submerged by the Rodman Reservoir, with the large outline of the spring boil visible on the water’s surface.

Discharge

Discharge from Catfish Springs, measured by the U.S. Geological Survey (USGS) in October 1935, was 10.6 cubic feet per second (cfs). In May 1999, USGS measured discharge at 5.0 cfs. The mean discharge is 7.8 cfs (see the table below).

Water quality

Catfish Springs was sampled by the St. Johns River Water Management District for water quality in 2008 (see the table below). Specific conductance and temperature were measured in 2005 by the district.

Summary statistics of water quality and discharge at Catfish Springs

Catfish Springs Min Mean Median Max Count Period
Discharge, cfs 5.00 7.80 7.80 10.60 2 1935−1999
Alkalinity, total, mg/L as CaCO3 43.7 43.7 43.7 43.7 1 2008
Calcium, total, mg/L as Ca 51.0 51.0 51.0 51.0 1 2008
Chloride, total, mg/L as Cl 399.0 399.0 399.0 399.0 1 2008
Magnesium, total, mg/L as Mg 24.0 24.0 24.0 24.0 1 2008
Nitrate + nitrite, total, mg/L as N 0.09 0.09 0.09 0.09 1 2008
Orthophosphate, total, mg/L as P 0.01 0.01 0.01 0.01 1 2008
Phosphorus, total, mg/L as P 0.02 0.02 0.02 0.02 1 2008
Potassium, total, mg/L as K 4.9 4.9 4.9 4.9 1 2008
Sodium, total, mg/L as Na 206.0 206.0 206.0 206.0 1 2008
Specific conductance, field, µmhos/cm at 25°C 1068 1290 1290 1512 2 2005−2008
Specific conductance, lab, µmhos/cm at 25°C 1490 1490 1490 1490 1 2008
Sulfate, total, mg/L as SO4 102.0 102.0 102.0 102.0 1 2008
Total dissolved solids, mg/L 863 863 863 863 1 2008
Water temperature, °C 18.6 20.0 20.0 21.4 2 2005−2008
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