Mathews (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°53'3", Longitude 81°52'55"
Period of record: 74 sampling dates; May 12, 1990 to December 26, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Lake Weir/Leesburg Upland
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered clayey sand and granular sand of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Central Lakes 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.3 |
Sulfate (mg/L) |
6.8 |
|
Total alkalinity (mg/L as CaCO3) |
38.3 |
Calcium (mg/L) |
7.0 |
|
Conductance (µS/cm @ 25 °C) |
167 |
Magnesium (mg/L) |
9.5 |
|
Color (Pt-Co units) |
11 |
Sodium (mg/L) |
7.0 |
|
Chloride (mg/L) |
24.3 |
Potassium (mg/L) |
3.0 |
|
Silicon (mg/L) |
0.6 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 74 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
7 |
15 |
25 |
|
Long-term total nitrogen concentrations (µg/L) |
710 |
1000 |
1500 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.3 |
9.0 |
32.3 |
|
Long-term Secchi depth (ft) |
2.1 |
7.9 |
13.4 |
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-30-99 |
13 |
730 |
5.7 |
12.2 |
|
Feb-27-99 |
15 |
740 |
6.0 |
11.3 |
|
Mar-27-99 |
18 |
710 |
4.0 |
11.5 |
|
Apr-25-99 |
16 |
720 |
4.3 |
10.8 |
|
May-28-99 |
17 |
780 |
5.3 |
10.1 |
|
Jun-27-99 |
16 |
820 |
8.0 |
8.9 |
|
Jul-31-99 |
17 |
810 |
6.3 |
8.2 |
|
Aug-28-99 |
18 |
800 |
6.0 |
6.7 |
|
Oct-23-99 |
13 |
740 |
7.3 |
7.5 |
|
Nov-29-99 |
10 |
760 |
8.3 |
7.3 |
|
Dec-26-99 |
16 |
870 |
5.0 |
9.0 |
|
|
|
|
|
|
|
1999 Average |
15 |
770 |
6.0 |
9.4 |