Back (Walton County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 30°44'31", Longitude 86°8'35"
Period of record: 50 sampling dates; March 11, 1993 to July 26, 1997
Surface area : No data available.
Lake Region (Griffith et al. 1997): Dougherty/Marianna Plains
Geologic formation (Brooks 1981):
The geology is dominated by gravel, sand and clay of the Citronelle Formation.
Physiographic region (Brooks 1981):
The water body lies in the De Funiak Karst division of the Dougherty Karst District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
6.7 |
Sulfate (mg/L) |
5.2 |
|
Total alkalinity (mg/L as CaCO3) |
6.1 |
Calcium (mg/L) |
2.2 |
|
Conductance (µS/cm @ 25 °C) |
36 |
Magnesium (mg/L) |
0.7 |
|
Color (Pt-Co units) |
12 |
Sodium (mg/L) |
3.9 |
|
Chloride (mg/L) |
6.6 |
Potassium (mg/L) |
0.9 |
|
Silicon (mg/L) |
1.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 50 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
7 |
12 |
17 |
|
Long-term total nitrogen concentrations (µg/L) |
240 |
370 |
580 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.3 |
6.2 |
19.3 |
|
Long-term Secchi depth (ft) |
4.3 |
7.1 |
11.0 |
Florida LAKEWATCH data were not collected in 1999.