Underhill (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°32'16", Longitude 81°20'10"
Period of record: 12 sampling dates; August 1, 1991 to June 1, 1996
Surface area (Shafer et al. 1986): 147 acres / 59 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Orlando Promontory division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 3 months sampled:
|
pH |
7.8 |
Sulfate (mg/L) |
21.9 |
|
Total alkalinity (mg/L as CaCO3) |
58.4 |
Calcium (mg/L) |
28.9 |
|
Conductance (µS/cm @ 25 °C) |
183 |
Magnesium (mg/L) |
13.1 |
|
Color (Pt-Co units) |
10 |
Sodium (mg/L) |
6.5 |
|
Chloride (mg/L) |
9.8 |
Potassium (mg/L) |
3.2 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 12 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
24 |
32 |
45 |
|
Long-term total nitrogen concentrations (µg/L) |
640 |
920 |
1160 |
|
Long-term total chlorophyll concentrations (µg/L) |
26.3 |
45.8 |
63.3 |
|
Long-term Secchi depth (ft) |
2.1 |
3.0 |
4.4 |
Florida LAKEWATCH data were not collected in 1999.