East Nassau (Nassau County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 30°36'47", Longitude 81°31'18"
Period of record: 15 sampling dates; September 18, 1996 to November 20, 1997
Surface area : No data available.
Lake Region (Griffith et al. 1997): Eastern Flatlands
Geologic formation (Brooks 1981):
The geology is dominated clastic and shell deposits of the Fort Thompson Group Formation
Physiographic region (Brooks 1981):
The water body lies in the Sea Islands subdivision of the Northern Coastal Strip division of the Sea Island District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
7.2 |
Sulfate (mg/L) |
17.0 |
|
Total alkalinity (mg/L as CaCO3) |
13.7 |
Calcium (mg/L) |
9.4 |
|
Conductance (µS/cm @ 25 °C) |
218 |
Magnesium (mg/L) |
3.0 |
|
Color (Pt-Co units) |
20 |
Sodium (mg/L) |
20.0 |
|
Chloride (mg/L) |
38.8 |
Potassium (mg/L) |
1.3 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 15 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
9 |
13 |
16 |
|
Long-term total nitrogen concentrations (µg/L) |
250 |
380 |
490 |
|
Long-term total chlorophyll concentrations (µg/L) |
2.0 |
7.2 |
19.7 |
|
Long-term Secchi depth (ft) |
4.5 |
7.2 |
9.5 |
Florida LAKEWATCH data were not collected in 1999.