East (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°59'27", Longitude 82°22'48"
Period of record: 20 sampling dates; August 16, 1998 to December 19, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Hillsborough Valley
Geologic formation (Brooks 1981):
The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Hillsborough Valley division of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
8.7 |
Total alkalinity (mg/L as CaCO3) |
31.0 |
|
Conductance (µS/cm @ 25 °C) |
220 |
Color (Pt-Co units) |
16 |
|
Chloride (mg/L) |
14.0 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 20 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
6 |
74 |
171 |
|
Long-term total nitrogen concentrations (µg/L) |
440 |
1480 |
2450 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
69.8 |
163.0 |
|
Long-term Secchi depth (ft) |
1.0 |
2.1 |
5.0 |
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-17-99 |
128 |
2020 |
117.0 |
1.0 |
|
Feb-14-99 |
171 |
2450 |
139.0 |
1.0 |
|
Mar-19-99 |
6 |
440 |
1.0 |
. |
|
Mar-22-99 |
13 |
540 |
1.7 |
. |
|
Mar-28-99 |
26 |
870 |
7.0 |
5.0 |
|
Apr-04-99 |
34 |
850 |
31.7 |
4.4 |
|
Apr-18-99 |
42 |
860 |
44.3 |
4.3 |
|
May-16-99 |
55 |
1100 |
23.7 |
2.5 |
|
Jun-26-99 |
52 |
920 |
27.7 |
3.0 |
|
Jul-25-99 |
50 |
1400 |
58.0 |
1.5 |
|
Aug-21-99 |
50 |
1670 |
70.7 |
2.0 |
|
Sep-19-99 |
55 |
1630 |
53.0 |
1.7 |
|
Oct-23-99 |
64 |
1660 |
64.0 |
2.0 |
|
Nov-21-99 |
67 |
1600 |
59.3 |
1.4 |
|
Dec-19-99 |
85 |
1830 |
71.3 |
1.5 |
|
|
|
|
|
|
|
1999 Average |
60 |
1320 |
51.3 |
2.4 |