Choctawhatchee Bay (Walton County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 30°23'18", Longitude 86°7'45"
Period of record: 26 sampling dates; November 3, 1996 to December 30, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Gulf Coast Lowlands
Geologic formation (Brooks 1981):
The geology is dominated by undifferentiated sand, shell, clay, marl, and peat of the Holocene.
Physiographic region (Brooks 1981):
The water body lies in the Coastal Strip division of the Apalachicola Delta District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
7.7 |
Sulfate (mg/L) |
208.7 |
|
Total alkalinity (mg/L as CaCO3) |
52.3 |
Calcium (mg/L) |
15.0 |
|
Conductance (µS/cm @ 25 °C) |
5797 |
Magnesium (mg/L) |
149.0 |
|
Color (Pt-Co units) |
14 |
Sodium (mg/L) |
1200.0 |
|
Chloride (mg/L) |
1771.0 |
Potassium (mg/L) |
47.0 |
|
Silicon (mg/L) |
2.7 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 26 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
14 |
23 |
34 |
|
Long-term total nitrogen concentrations (µg/L) |
330 |
440 |
540 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
4.7 |
17.0 |
|
Long-term Secchi depth (ft) |
1.4 |
3.2 |
6.3 |
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 |
|
Mar-24-99 |
34 |
510 |
3.7 |
1.7 |
|
Jun-30-99 |
31 |
480 |
11.7 |
2.0 |
|
Jul-18-99 |
24 |
460 |
7.3 |
2.4 |
|
Aug-30-99 |
21 |
440 |
6.3 |
3.1 |
|
Sep-26-99 |
20 |
450 |
6.7 |
3.5 |
|
Oct-28-99 |
14 |
400 |
3.3 |
6.0 |
|
Nov-28-99 |
18 |
450 |
1.7 |
. |
|
Dec-30-99 |
20 |
450 |
2.3 |
4.1 |
|
|
|
|
|
|
|
1999 Average |
23 |
450 |
5.4 |
3.3 |