Mary (Seminole County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°45'14", Longitude 81°18'54"
Period of record: 62 sampling dates; August 23, 1991 to December 12, 1999
Surface area (Shafer et al. 1986): 156 acres / 63 hectacres
Lake Region (Griffith et al. 1997): Crescent City/DeLand Ridges
Geologic formation (Brooks 1981):
The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Casselberry-Oviedo-Geneva-Chuluota Hills division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 62 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
5 |
13 |
19 |
|
Long-term total nitrogen concentrations (µg/L) |
330 |
600 |
810 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
4.9 |
12.3 |
|
Long-term Secchi depth (ft) |
5.5 |
8.4 |
12.0 |
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-24-99 |
12 |
540 |
3.7 |
9.5 |
|
Feb-28-99 |
11 |
540 |
3.7 |
7.9 |
|
Mar-31-99 |
14 |
570 |
3.0 |
8.4 |
|
Apr-29-99 |
8 |
580 |
3.7 |
7.7 |
|
May-31-99 |
14 |
810 |
5.0 |
6.5 |
|
Jun-27-99 |
13 |
660 |
5.3 |
6.7 |
|
Jul-18-99 |
14 |
660 |
5.0 |
6.8 |
|
Aug-15-99 |
17 |
730 |
6.0 |
8.0 |
|
Sep-22-99 |
19 |
720 |
9.7 |
5.8 |
|
Oct-10-99 |
19 |
730 |
9.3 |
6.3 |
|
Nov-14-99 |
14 |
600 |
6.7 |
7.0 |
|
Dec-12-99 |
15 |
650 |
5.7 |
7.3 |
|
|
|
|
|
|
|
1999 Average |
14 |
650 |
5.6 |
7.3 |