Sunset (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°8'9", Longitude 82°37'31"
Period of record: 56 sampling dates; December 2, 1990 to December 31, 1999
Surface area (Shafer et al. 1986): 37 acres / 15 hectacres
Lake Region (Griffith et al. 1997): Keystone Lakes
Geologic formation (Brooks 1981):
The geology is dominated by argillaceous to sandy impure limestone of the Tampa Formation.
Physiographic region (Brooks 1981):
The water body lies in the Land-O-Lakes subdivision of the Tampa Plain division of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 4 months sampled:
|
pH |
7.6 |
Sulfate (mg/L) |
15.4 |
|
Total alkalinity (mg/L as CaCO3) |
52.7 |
Calcium (mg/L) |
21.9 |
|
Conductance (µS/cm @ 25 °C) |
221 |
Magnesium (mg/L) |
3.0 |
|
Color (Pt-Co units) |
27 |
Sodium (mg/L) |
15.3 |
|
Chloride (mg/L) |
28.6 |
Potassium (mg/L) |
1.5 |
|
Silicon (mg/L) |
0.7 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 56 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
8 |
16 |
24 |
|
Long-term total nitrogen concentrations (µg/L) |
340 |
740 |
980 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.3 |
12.9 |
34.3 |
|
Long-term Secchi depth (ft) |
2.9 |
4.3 |
8.5 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:
|
Date |
TP (µg/L) |
TN (µg/L) |
CHL (µg/L) |
SECCHI (ft |
|
Feb-01-99 |
16 |
690 |
11.3 |
4.0 |
|
Mar-01-99 |
15 |
830 |
8.3 |
5.0 |
|
Apr-01-99 |
19 |
680 |
8.0 |
3.8 |
|
May-03-99 |
17 |
710 |
9.3 |
4.0 |
|
Jun-01-99 |
21 |
700 |
9.7 |
4.5 |
|
Jul-03-99 |
19 |
850 |
14.3 |
4.0 |
|
Aug-04-99 |
12 |
620 |
11.7 |
4.1 |
|
Sep-01-99 |
22 |
800 |
12.0 |
3.8 |
|
Oct-01-99 |
12 |
780 |
12.0 |
4.7 |
|
Nov-01-99 |
17 |
720 |
11.0 |
4.8 |
|
Dec-01-99 |
20 |
850 |
13.0 |
4.0 |
|
Dec-31-99 |
20 |
910 |
20.3 |
3.6 |
|
|
|
|
|
|
|
1999 Average |
18 |
760 |
11.8 |
4.2 |