Grassy (Highlands County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°15'14", Longitude 81°20'6"
Period of record: 65 sampling dates; June 14, 1994 to December 22, 1999
Surface area (Shafer et al. 1986): 517 acres / 209 hectacres
Lake Region (Griffith et al. 1997): Southern Lake Wales Ridge
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered beach and dune sand with some clay lenses of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Eastern Complex of the Central Ridge subdivision of the Lake Wales Ridge division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
7.4 |
Sulfate (mg/L) |
21.2 |
|
Total alkalinity (mg/L as CaCO3) |
15.5 |
Calcium (mg/L) |
9.8 |
|
Conductance (µS/cm @ 25 °C) |
150 |
Magnesium (mg/L) |
3.5 |
|
Color (Pt-Co units) |
10 |
Sodium (mg/L) |
7.9 |
|
Chloride (mg/L) |
19.0 |
Potassium (mg/L) |
3.6 |
|
Silicon (mg/L) |
0.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 65 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
6 |
9 |
12 |
|
Long-term total nitrogen concentrations (µg/L) |
520 |
610 |
750 |
|
Long-term total chlorophyll concentrations (µg/L) |
2.0 |
3.9 |
8.0 |
|
Long-term Secchi depth (ft) |
7.0 |
10.2 |
15.0 |
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 |
|
Jan-25-99 |
9 |
610 |
6.7 |
10.7 |
|
Feb-20-99 |
12 |
640 |
5.0 |
9.3 |
|
Mar-13-99 |
10 |
650 |
4.0 |
10.7 |
|
Apr-21-99 |
10 |
600 |
2.0 |
10.2 |
|
May-21-99 |
10 |
750 |
3.0 |
9.3 |
|
Jun-27-99 |
8 |
600 |
3.3 |
11.3 |
|
Jul-17-99 |
8 |
610 |
3.0 |
12.8 |
|
Aug-19-99 |
8 |
590 |
3.7 |
13.5 |
|
Sep-24-99 |
9 |
580 |
4.0 |
12.3 |
|
Oct-23-99 |
8 |
620 |
5.0 |
11.7 |
|
Nov-29-99 |
11 |
690 |
4.7 |
11.5 |
|
Dec-22-99 |
8 |
700 |
3.0 |
13.3 |
|
|
|
|
|
|
|
1999 Average |
9 |
640 |
3.9 |
11.4 |