In this section
Blackwater Springs main view
photo by T. Roberts, FGS
Blackwater Springs is a third-magnitude spring that is composed of seven pools filled with organic debris and white, sulfur-reducing bacteria. The main spring run flows about 250 feet toward the west to Black Water Creek. Swampy lowland forests surround the springs.
Blackwater Springs pool and run
Discharge from Blackwater Springs, measured by the U.S. Geological Survey (USGS) in 1981, was 1.4 cubic feet per second.
Blackwater Springs was sampled once by USGS in 1981 and once in 2004 by Lake County. Summary statistics of the water quality data for selected variables are shown in the table below.
Summary statistics of water quality and discharge at Blackwater Springs
|Alkalinity, total, mg/L as CaCO3||82.6||82.6||82.6||82.6||1||2004|
|Calcium, total, mg/L as Ca||71.0||71.0||71.0||71.0||1||2004|
|Chloride, total, mg/L as Cl||9.4||10.1||10.1||10.7||2||1981−2004|
|Magnesium, total, mg/L as Mg||18.2||18.2||18.2||18.2||1||2004|
|Potassium, total, mg/L as K||1.0||1.0||1.0||1.0||1||2004|
|Sodium, total, mg/L as Na||5.2||5.2||5.2||5.2||1||2004|
|Specific conductance, field, µmhos/cm at 25°C||575||575||575||575||1||2004|
|Specific conductance, lab, µmhos/cm at 25°C||520||520||520||520||1||1981|
|Sulfate, total, mg/L as SO4||161.8||165.9||165.9||170.0||2||1981−2004|
|Total dissolved solids, mg/L||371||396||396||421||2||1981−2004|
|Water temperature, °C||24.0||24.4||24.4||24.8||2||1981−2004|
mg/L = milligrams per liter
cfs = cubic feet per second